Science Form 5 _waja2009

SCIENCE FORM 5 (WAJA PERAK 2009)

1

Name: ……………………………………………… Class : …… Chapter 1 Exercise 1 Learning Area: Microorganisms and Their Effects on Living Things Learning Objective: Understanding the classification of microorganisms. 1. Based on their characteristics, microorganisms can be classified into five groups. Complete the diagram below.

2. Diagram below shows microorganisms.

A B C D E Identify the group of microorganisms A, B, C , D and E

A: ………………….. B: ………………….. C: ………………………… D: …………………… E: ………………….. 3. Complete the table below;

Characteristic Group of microorganisms

(a) Exist in different shapes and are generally named according to their shapes.

(b) Cannot reproduce outside living cell.

(c) Can be crystallized.

(d) They are able to make their own food by photosynthesis.

(e) Most reproduce asexually by formation of spores or sexually by conjugation.

(f) They are unicellular animals and have the structure of general animal cells.

FIVE GROUPS OF MICROORGANISMS

Score: …./16 x 100 = …….%


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Name: …………………………………………….. Class : …… Chapter 1 Exercise 2 Learning Area: Microorganisms and Their Effects on Living Things Learning Objective: Synthesising ideas about the factors that affect the growth of microorganisms.

1. The growth of microorganisms is very much affected by environmental factors such as (a) ____________________ (b) _________________ (c) __________________ (d) ____________________ (e) _________________ Clue :

2. Diagram 1 shows an experiment to study the effect of pH value of medium on bacterial growth.

After two days, the number of bacteria colony in each dish is counted. The results are shown in Table 1.

pH value Number of bacteria colony

2 0

7 26

13 0

P A U T E R E M RA

T E G I H L T H p

M I Y U T I D H S E N T U T R I N

Petri dish P Nutrient agar

+ Hydrochloric acid (pH 2)

+ Bacteria culture

Petri dish Q Nutrient agar

+ Distilled water (pH 7)

+ Bacteria culture

Petri dish R Nutrient agar

+ Sodium hydroxide (pH 13)

+ Bacteria culture

Diagram 1

Table 1

Score: …./12 x 100 = …….%


3

Based on Diagram 1 and Table 1, match Section A to Section B.

Name: …………………………………………….. Class : …… Chapter 1 Exercise 3 Learning Area: Microorganisms and Their Effects on Living Things Learning Objective: Applying knowledge about useful microorganisms. 1. The statements below show the uses and roles of beneficial microorganisms in daily life

A Yeast acts on carbohydrate to produce carbon dioxide that cause breads and cakes to rise. B Dead organisms such as plants and animals undergo a process called decomposition

caused by bacteria and fungi C Penicillin, which is produced from a certain type of fungus helps us to produce

antibiotics. D Microorganisms such as bacteria and virus play an important role in the preparation of

vaccines. E Certain algae produce beta carotene to prevent cancer F Bacteria living in herbivores digestive system secrete an enzyme called cellulose which

helps to digest cellulose. G Nitrogen fixing bacteria helps to bind nitrogen from the atmosphere and convert it to

nitrate in the soil. H Yeast acts on glucose solution to produce alcohol. I Bacteria is used to oxidize alcohol in making of vinegar J Microorganisms are also used in biological control

Section A Section B

(i) Aim of the experiment

(ii) Hypothesis

(iii) Fixed variable

(iv) Manipulated variable

(v) Responding variable

(vi) Alkaline

(vii) In neutral condition

(a) pH more than 7.

(b)To study the effect of pH on the growth of bacteria growth of microorganisms (c)Microorganisms grow and multiply rapidly

(d) Bacteria growth is highest at pH 7

(e)Type of nutrients

(f)The growth of bacteria

(g) pH value

Score: …./ 10 x 100 = …….%


4

Group the above statements into five categories

Category Statement

(a) Food digestion

(i)………………………………………………………………….

(b) Decaying process

(i)………………………………………………………………….

(c) Medicine

(i) ……………………………………………………………….. (ii) ……………………………………………………………….. (iii) ……………………………………………………………….

(d) Agriculture

(i) ……………………………………………………………….. (ii) ………………………………………………………………..

(e) Industry

(i) ……………………………………………………………….. (ii) ……………………………………………………………….. (iii) ……………………………………………………………….


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Name: ………………………………………………… Class : …… Chapter 1 Exercise 4 Learning Area: Microorganisms and Their Effects on Living Things Learning Objective: Analysing the harmful effects of microorganisms.

1. Identify the diseases caused by microorganisms from the cross word puzzle below.

M O T I N E A S H C E N D O L

C E C A T I D M C H O L E R A

P T A A I H U A R T U N N O T

O I N S I A B E T E S E G N R

L B M A L A R I A L A M U A O

I E R L J E C A N C E R E L S

O A E R I C S G K R M P F D A

M S V R S T G W O L M K E I I

Y A M R I N G W O R M I V N D

E T K M L D A K P O A J E H S

L G A A T R I C A H R E R O R

I B M U M P S Y U R I M R N O

T D Y S B N T S Y P H I L I S

I H D Y S E N T E R Y J I O I

S L A H E P A T I T I S B S T

Diseases caused by ; i) Viruses : ……………………………………………………………… (6 diseases) ii) Bacteria : ………………………………………………………………… (2 diseases) iii) Fungi :……………………………………………………………………. (2 diseases) iv) Protozoa: ………………………………………………………………… (2 diseases)

Score: …./ 12 x 100 = …….%


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Name: ……………………………………………… Class : …… Chapter 1 Exercise 5 Learning Area: Microorganisms and Their Effects on Living Things Learning Objective: Analysing ways to prevent infection caused by microorganisms.

1. Study the terms below.

Complete the following statements with the correct terms.

Statement Term (a) Process of injecting vaccine

(b) A process to kill microorganisms

(c) Chemicals used to kill or inhibit the growth of microorganisms on the skin

(d) Produced by white blood cells to fight against the invading antigens

(e) Harmful microorganisms causing diseases.

(f) Substance containing animal antibodies

(g) Pathogen or microbes in blood

(h) An agent that carries diseases

(i) Substance containing weakened pathogen

(j) The ability of the body to resist pathogens infections

Vector Immunity Sterilization Vaccine

Vaccination Antigen Antiseptics Antibody

Serum

Pathogen

Score: …./ 21 x 100 = …….%


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2. The following are steps how to prepare the serum from a horse. (a) The body of the horse produces antibodies for a particular disease. (b) The horse blood is centrifuged to obtain the serum (c) The horse is injected with microorganism of a particular disease. (d) The horse’s blood is extracted. Rearrange the steps above to show how to prepare the serum from a horse. (i) ……………………………………………………………………… (ii) ………………………………………………………………………

(iii) ……………………………………………………………………….

(iv) ……………………………………………………………………….

3. The diagram below shows the types of immunity. Name A : …………………………………. E : ………………………………… B: …………………………………. F : ………………………………… C: ………………………………….. G: ………………………………… D: ………………………………….

Immunity

Active A

B C

Example: E Example: Vaccine

Natural D

Example: F

Example: G


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Name: ……………………………………………… Class : …… Chapter 1 Exercise 6 Learning Area: Microorganisms and Their Effects on Living Things Learning Objective: Understanding how diseases caused by microorganisms are treated.

Fill in the blanks with the correct answers. Choose the word from the box given. 1. During surgery, the tissue or organ that is damaged or infected by diseases is ………………… or

………………………

2. Antibiotic given by the doctor must be consumed based on the allocated time and quantity. This is to

ensure that all the pathogens causing the diseases are ……………. by the antibiotic. Otherwise, the

surviving ………………….. will develop resistance towards the antibiotic. Hence, the same

……………………….. will not be able to cure the same diseases in the future.

3. Example of diseases that can be cured with antibiotics include …………….and …………………

Antibiotic cannot be used to cure diseases that are caused by …………………….

4. …………………. (x-rays or gamma rays) is used to kill ……………………….. cells in tumour.

5. In …………………. , microorganisms are used in genetic engineering such as the production of

……………………….. for diabetics.

6. To conserve the environment, ……………………. is used in the treatment of sewage.

7. Drugs are harmful to the body if taken in excess amounts. Over consumption of aspirin in the long

term can damage the …………………….. and ………………………….

8. Antibiotics such as …………………….. can only be taken when prescribed and supervised by

………………………….. .

9. Use of …………………………… is a common type of traditional treatment.

10. Two examples of diseases that are easily treated with antiserum are ……………………….. and

……………………………….

Penicillin cancer biotechnology antibiotic

killed liver replaced herbs

virus pathogens doctors tuberculosis

kidneys rabies gonorrhea removed

insulin tetanus radiotherapy bacteria

Score: …./ 20 x 100 = …….%


9

Name: …………………………………………… Class : …… Chapter 2 Exercise 1 Learning Area: Nutrition and Food Production Learning Objective: Evaluating the importance of taking good nutrition and practicing good eating habits. 1. The energy content of food is known as its ______________ value. 2. The calorific value of food can be determined by using a _______________ 3. The calorific value of food is its energy content that is measured as _____________ 4. The table below shows the calorific values of three types of food.

Bread 10.1 kJ g - 1

Half-boiled egg 6.6 kJ g - 1 Milk 2.7 kJ g - 1

If Amin takes 50 g of bread, 30 g of half-boiled egg and 250 g of milk, what is the total energy that he takes? 5. The table below shows the calorific values of different types of food.

Food Calorific value (kJ / 100g) Rice 1504 Canned sardine 1194 Tea (sugar free) 0 Banana 318

The information below shows the types of food taken by Arifah for breakfast. What are the total calories that Arifah has taken?

300 g of rice 50 g of sardine 1 cup of sugar free tea 40 g of banana

Score: …../20 x 100 = ……%


10

6. Complete the table below.

Factor Explanation

Gender

(a) __________ needs more energy than _______________ (b) Males are more ________ and have a higher __________ rate.

Body size (c) A person with ________ body size requires ________calories.

Age

(d) _________,_________ and teenagers need more calories than

older persons because they are more _______________

Physical activities

(e) A physically active worker needs ___________ energy to work.

State of health

(f) A _________person requires _________calories than a sick person.

Surrounding temperature

(g) A person who stays in a ___________ surrounding needs

more calories because they lose their body heat to the

environment.

(h)More energy is needed to replace ___________ lost due to cold

environment to maintain constant __________ temperature.


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Name: …………………………………………….. Class : …… Chapter 2 Exercise 2 Learning Area: Nutrition and Food Production Learning Objective: Evaluating the importance of taking good nutrition and practicing good eating habits. 1. Eating an ___________ diet in which certain food substances are __________ or in wrong proportions.

2. Fill in the blanks with correct answer.

Disease Nutrient lacking Main symptoms

Marasmus

Lack of carbohydrate

� Weak and dehydrated

� (a) Severely ____________

Kwasyiorkor

(b) Lack of ____________

� Failure to grow.

� (c)Swollen _____________

Anaemia

(d)Lack of ___________

� (e) Pale because lack of

_____________ � Loss of appetite

Goitre

(f) Lack of ____________

� Large swelling at neck

Scurvy

(g) Lack of ____________

� (h) Swollen and _____________ gums.

Rickets

Lack of vitamin D

� (i) Bent legs due to weak

____________

Night blindness (j) Lack of ____________ � (k) Poor night ______________

3. Fill in the blank with the correct answer.

Obesity: � When a person is 20 % above the recommended weight for their height.

� Any carbohydrate that is not used is converted to ___________ and stored around

organs like ___________,___________ and under the skin.

� People who are obese have high concentration of_________________

� Obese people will tend to develop diseases like ___________________, diabetes

and______________________

� Can be prevented by controlling the diets and types of food eaten daily and by ___________

Score: …../26 x 100 = ……%


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� The BMI (Body Mass Index) may be used to determine whether you are obese.

2 2

( )

( )

mass kgBMI

height m= Below 20 = thin, 20–25 = normal, 26-30 = overweight, > 30 = obese

4. Fill in the blank with the correct answer.

Aneroxia Nervosa: � A psychological illness

� An illness due to fear of gaining _________ and starve oneself to become ________

� Occurs often in _____________

� Symptoms include: becoming very _____________, muscles wasting and _______________

� Can be cured through proper __________and counseling.

Name: …………………………………………… Class : …… Chapter 2 Exercise 3 Learning Area: Nutrition and Food Production Learning Objective: Evaluating the importance of taking good nutrition and practicing good eating habits. 1. Complete the table below

Unhealthy eating habit Consequences

Too much meat and fried food

Too much salty food

Too much snacks and sugary food

Not enough fibre

Score: …../14 x 100 = ……%


13

2. Complete the flow chart.

3. The tables below show the amount of food eaten by a sixteen-year old Darlene and her twin brother David in a day. Darlene:

Type of food Calorific value per 100 g (kJ) Quantity of food eaten (g)

Carrot 96 200 Orange 147 50

Mineral water 0 1000 David:

Type of food Calorific value per 100g (kJ) Quantity of food eaten (g)

Rice 1530 600 mutton 1190 300

Chicken (deep fried) 880 500 Potato chips 1030 700

Ice cream 800 800 Mineral water 0 1000

(a) What is a calorific value of food?

_______________________________________________________________

(b) What is the apparatus used to measure calorific value?

_______________________________________________________________

Good eating habits

(a) Eat variety of food in moderation. (b) ___________________________ (c) ___________________________

Benefits

(d) Maintain good health.

(e) ____________________________ .


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(c) Calculate the total calories intake for Darlene and David for a day. (d) The daily energy requirement for a female is 10800 kJ and a male teenager is 13900 kJ. What can you conclude about their daily energy intake?

________________________________________________________________________

________________________________________________________________________

(e) Why does female teenager need less energy than male teenager?

_________________________________________________________________________

(f) Suggest one health problem Darlene and David may develop if they continue with their diet for a long time.

_________________________________________________________________________

Name: ……………………………………………. Class : …… Chapter 2 Exercise 4 Learning Area: Nutrition and Food Production Learning Objective: Analysing the nutrient requirements of plants. 1. Fill in the blanks with suitable answers from the box below. The answers maybe use more than once.

Plants carry out the process of ________________ to transform ________compounds

into organic ones. The plants use __________ __________, _________________ and

energy from the ________ to form __________________ and release oxygen. The word

equation for the process is:

___________ ____________ + ____________ ____________ + oxygen

Only plants with _________________ can carry out _____________________. The

______________ enable the plants to absorb ___________ energy from the sun to break

__________ molecules into ___________ and ___________ atoms. _______________

combine with ______________ ______________ to form _________________ needed by the

plant.

Glucose oxygen light chlorophyll inorganic sun Hydrogen photosynthesis transpiration nitrogen kinetic

Starch water carbon dioxide

…………...

…………...

Score: …../36 x 100 = ……%


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2. Complete the concept map. 3. Match the mineral elements with its function.

Calcium Needed for cell division, development and formation of roots

Phosphorus

Potassium

Magnesium

Component of chlorophyll

Synthesis of protein and nucleic acid.

Needed for synthesis of nucleic acids, proteins, hormones and chlorophyll

Needed to form cell wall and for growth

Nitrogen

Macronutrient Micronutrient

Definition: Definition:

(i)

(ii)

(iii)

(iv)

Example of elements

(i)

(ii)

(iii)

(iv)

Example of elements

PLANT NUTRIENT


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Name: ……………………………………………… Class : …… Chapter 2 Exercise 5 Learning Area: Nutrition and Food Production Learning Objective: Analysing the nutrient requirements of plants. 1. Match the symptoms of mineral deficiency with its mineral elements. 2. Diagram shows a set-up of an experiment to study the nutrient requirement in a plant.

(a) State the variables for this experiment

(i) Manipulated variable ____________________________________

(ii) Responding variable _____________________________________

(b) What is your hypothesis for this experiment?

_________________________________________________________________

__________________________________________________________________

(c) After 2 weeks, predict your observation for

(i) test tube A

________________________________________________________________

________________________________________________________________

(ii) test tube B

________________________________________________________________

________________________________________________________________

(iii) test tube D

_______________________________________________________________

Nitrogen

Phosphorus

Potassium

Stunted root growth, produce little flowers and fruits and have leaf with purple tips. Stunted growth, premature death and have leaf with yellow and brown margins.

Stunted growth, yellowing of mature leaf followed by younger leaf (chlorosis).

Score: …../12 x 100 = ……%


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_______________________________________________________________

(d)What is the function of test tube D?

__________________________________________________________________

(e) Why do…

(i) The test tubes need to be aerated daily?

_______________________________________________________________

(ii) Wrapped with black paper?

_______________________________________________________________

Name: ……………………………………………. Class : …… Chapter 2 Exercise 6 Learning Area: Nutrition and Food Production Learning Objective: Analysing balance in nature. 1. Study the nitrogen cycle below.

(a) Complete the table based on the nitrogen cycle.

Process Name of the process Bacteria involved

A

B

Ammonification

Decomposing bacteria

C

D

(b) The plant can absorb nitrogen compound in the form of X. What is X?

________________________________________________________________

Atmospheric N2

X

Nitrites Ammonium Compound

Plants Animals

A

C B B

C

D

Score: …../16 x 100 = ……%


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(c) Process A can also happen without the bacteria. Name 3 process that can carry out process A without the bacteria.

(i) _________________________________________________________

(ii) _________________________________________________________

(iii) _________________________________________________________

2. Complete the diagram to show the importance of nitrogen cycle.

Name: ……………………………………………… Class : …… Chapter 3 Exercise 1 Learning Area: Preservation and Conservation of The Environment. Learning Objective: Analysing balance in nature. 1. Fill in the blanks with the suitable word. Balance in nature refers to interaction between ___________________; interaction between

organisms and their __________________ and the existence of _____________________

equilibrium. Balance in nature can be maintained with the help of natural cycles such as

_________________ cycle, __________________ cycle and ______________________

cycle. The natural cycle helps to maintain balance in nature by _____________________

important resources needed for the _________________ of organisms and ensure they

can be used again by the organisms.

(a) Maintain the __________ of the soil.

(c)Maintain the ___________ of nitrogen gas in the ___________

(b) Reducing ___________ in the environment.

(d) Supply _______ to plants and animal to build _________

Importance of Nitrogen

Cycle

Score: …./28 x 100 = ……%


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2. Complete these natural cycles.

(a) Carbon cycle: (b) Nitrogen cycle:

(c) Water cycle:

Green plants in sunlight

_________________ formed

Carbohydrates stored in ________________

____________, combustion and __________of dead plants and animals

Oxygen released

Food for animals

Carbon dioxide in the atmosphere

____________

Atmospheric Nitrogen

Nitrates

………………………

……………

Plants Animals

……………..

Lightning

Nitrogen fixing bacteria

……………..

…………….. ……………..


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Based on the diagram above, identify the different parts of the water cycle:

1. The sun.

2. ……………………………..

3. ……………………………..

4. …………………………….

5. …………………………….

3. Complete the text below.

The Water Cycle

The ……………….. evaporates ………………..from lakes and oceans. As the air rises, it

cools. The water vapour condenses into tiny droplets of ……………………… The droplets

join together and form ………………….. Wind blows the clouds towards the land. The

clouds gets heavier and falls as ………………... Rain water on the ground flows off the

land and returned to the ………………… and ……………………..

Name: ……………………………………………… Class : …… Chapter 3 Exercise 2 Learning Area: Preservation and Conservation of The Environment. Learning Objective: Analysing balance in nature. 1. Study the food web and answer the following question.

(a) What is a food web?

…………………………………………………………………………………………….

(b) Based on the food web above, construct a food chain with five organisms?

…………………………………………………………………………………………….

(c) What is being transferred from one organism to another in a food web?

…………………………………………………………………………………………….

(d) Based on the food chain constructed in 3(b), build a pyramid of numbers.

Paddy Rat

Chicken

Grasshopper

Snake Eagle

Human beings

Frog

Score: …./30 x 100 = ……%


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(e) What happens to the food web if the paddy is destroyed by floods?

…………………………………………………………………………………………………

…………………………………………………………………………………………………

(f) How does the food web help to maintain the balance nature?

…………………………………………………………………………………………………

2. Natural disasters can disrupt the balance in nature by:

(a) Causing changes in population of ……………….., animal and people.

(b) Destroying the natural …………………….

(c) Disrupting natural …………………………

3. Complete the table below.

Type Effects of destruction

Floods

(i) Destroys crops ……………… and ………………

(ii) Spread diseases like ………………. and ………………………..

Drought

(iii) Plants will ……………… and cause …………………….

if drought is prolonged.

Earthquakes

(iv) Destroy ………………, properties and ………………………

(v) Causing …………………… if occur under the ocean.

(vi) Causing terrible damage to ……………….. and ……………………

and natural habitats of organisms.

Volcanic Eruptions

(vii) Produce ………………. and ……………………… gases.

(viii)Causing …………………. and ………………. pollution.

(ix) Dust clogs the stomata of leaves → reduces the rate of

…………………… and food production

(x) ………………….. will burn, bury or flattened things in their path.

Hurricanes Typhoons Cyclones

(xi) Strong winds and heavy rains that move from sea to ……………..

(xii) Will cause towns to be ………………………..

(xiii) Trees and buildings will be ……………………..


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Name: …………………………………………… Class : …… Chapter 3 Exercise 3 Learning Area: Preservation and Conservation of The Environment. Learning Objective: Analysing the effects of environmental pollution. 1. Complete the following diagrams.

(b) …………………

(a) …………………

(e) …………………..

(d) ……………………

(f) ……………………

(c) …………………

Sources of

Pollution

Score: …./16 x 100 = ……%


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2. Complete the diagram.

(a) ……………………..

(b) ……………………...

(f) ……………………...

(d) ……………………….

(c) ………………………..

Effect of the environment

al pollution


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3. Complete the flow chart.

Environmental Pollution

Definition:

Effects to:

Human health

Habitats and nature

Loss of economic resources

Extinction of species


25

Name: …………………………………………… Class : …… Chapter 3 Exercise 4 Learning Area: Preservation and Conservation of The Environment. Learning Objective: Analysing the effects of environmental pollution. 1.

Average global temperature of earth is …………………

More ……….. from the …………… trapped between the layers in

the Earth’s atmosphere and cannot be ……………………. back to

the space due to ………………. of greenhouse gases.

Means

Caused by

Effects to earth environment

1. Extensive melting of the …………. , making the sea level ………….. 2. Low lying coastal areas gets ………………… 3. Changing ……………...patterns and affecting agricultural …………. 4. Occurrence of ……………. in dry regions causing …………………. 5. ……………. of corals due to …………………. coastal areas.

Global Warming

Score: …./14x 100 = ……%


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Name: …………………………………………… Class : …… Chapter 3 Exercise 5 Learning Area: Preservation and Conservation of The Environment. Learning Objective: Analysing the effects of environmental pollution. 1. The diagram below shows a hole in the ozone layer.

(a) Where is the ozone layer located in the Earth’s atmosphere?

……………………………………………………………………………………………….

(b) What is the importance of the ozone layer?

………………………………………………………………………………………………

(c) Name the pollutant that causes holes in the ozone layer

……………………………………………………………………………………………….

(d) Name two uses of pollutant named in (c).

(i) …………………………………………………………………………………………..

(ii) ………………………………………………………………………………………….

(e) Explain how this pollutant destroys the ozone layer.

……………………………………………………………………………………………….

………………………………………………………………………………………………

………………………………………………………………………………………………

(f) Suggest one way we can protect the ozone layer.

………………………………………………………………………………………………

Ozone layer

SUN

Ozone layer

Score: …./13 x 100 = ……%


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2. Complete the diagram. Name: ……………………………………………… Class : …… Chapter 3 Exercise 6 Learning Area: Preservation and Conservation of The Environment. Learning Objective: Synthesizing the idea of preservation and conservation of the environment and pollution control. 1. The diagram below shows a factory giving out pollutants into air and water.

(a) Name another acidic gas that combines with rain water to form acid rain.

…………………………………………………………………………………………………

(b) State two harmful effect of acid rain to the environment.

(i) …………………………………………………………………………………………….

(ii) …………………………………………………………………………………………….

(c) Suggest one way the factory can reduce the emission of acidic gases.

………………………………………………………………………………………………….

………………………………………………………………………………………………….

(d) State another source of pollution which can cause acid rain.

………………………………………………………………………………………………….

Effects of

thinning of ozone

layer

(b) To other living things: (i) …………………………… (ii) …………………………… (iii) ……………………………

(a) To human: (i) …………………………… (ii) ………………………….. (iii) …………………………..

Score: …./5 x 100 = ……%


28

Name: ……………………………………………… Class : …… Chapter 3 Exercise 7 Learning Area: Preservation and Conservation of The Environment. Learning Objective: Evaluating the importance of proper management of natural resources in maintaining balance in nature. 1. The diagram below shows Pak Aman’s farm.

Pak Aman plants vegetables, rears fresh water fish and poultry for sale. He uses chemical fertilizers and pesticides to maintain and increase the yield of his vegetables. After some time, he finds that the surface of the pond is covered with a layer of green substance and the fish died. This is how Pak Aman overcomes the problems in his pond.

Choose the suitable words from the box to fill in the blanks.

(a) Problem statement:

……………… grows on the water surface and the fish dies.

(b) Phenomena:

…………………….

(c) Clarification of the Problem:

Excessive …………….. and waste from the poultry contain …………… and ……………. compounds which encourage the growth of algae. ……………… from the vegetable farm contain DDT which is ……………. to living organisms.

(d) Solving methods:

Convert the poultry waste into ………………………. And

used as fertilizer instead of chemical fertilizer.

Use …………………………………… methods instead of

pesticides.

Algae eutrophication fertilizer Nitrate biological control harmful compost phosphate DDT

Poultry

Score: …./25 x 100 = ……%


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2. Fill in the blanks with suitable words on environmental pollution control.

(a) The best way to manage used plastic and metals is by ……………………

(b) Excessive carbon dioxide in the air can be eliminated by ……………. more green ………….

(c) Carbon monoxide can be turned in carbon dioxide by using ……………………….. converter.

(d) ………………………….. is the best method to control pest.

(e) Chlorofluorocarbon can be replaced with ………………………………

(f) Soot and dust smoke from factories can be removed by fixing electrostatic ……………….. in

chimneys.

3. Fill in the blanks with correct answer.

Proper management of natural resources

(a) Logging

(i) ……………… forest after

logging create ……………

reserves.

(ii)Impose firm actions on illegal loggers.

(c)Mining

(i) ……………… metal product.

(ii) Look for alternative material to

replace metal and fossil fuels

(b)Fishing

(i) Ban the use of ………………

(ii) Ban fishing during …………..

season.

(iii) Prevent oil ……………………

(d)Land management

(i) Planting ……………..crops and

making …………….… hill.

(ii) Practice ……………..planting

crops


30

Name: ……………………………………………… Class : …… Chapter 4 Exercise 1 Learning Area: Carbon Compounds. Learning Objective: Analysing various carbon compounds. 1.

Hydrocarbon

compounds

Definition Natural resources

1. _________________ 2. _________________ 3. _________________

CARBON

COMPOUNDS

Carbon compounds are compounds that contain ____________ elements.

Definition

Organic compounds

Inorganic compounds Classification

Differences

Burns in air producing carbon dioxide

Size of molecules or compounds

Solubility

Examples

Origin

Score: …./15 x 100 = ……%


31

Name: …………………………………………… Class : …… Chapter 4 Exercise 2 Learning Area: Carbon Compounds. Learning Objective: Analysing alcohol and its effects on health. 1. Diagram 1 shows a process to produce alcohol in the laboratory. Diagram 1 (a) Name the process that occurs inside the conical flask?

………………………………………………………………………………………………….

(b) What gas causes the lime water to turn cloudy?

…………………………………………………………………………………………………

(c) Complete the word equation below to show the reaction in the conical flask.

A fermented product from the Diagram 1 is placed in the distillation flask as shown in

Diagram 2.

Diagram 2 (d) Show the direction of water flow in and out of the Liebig Condenser.

(e) Name liquid X.

………………………………………………………………………………….

(f) What is the optimum temperature to obtain liquid X.

………………………………………………………………………………….

Glucose Carbon dioxide + Zymase enzymes

Yeast

Score: …./32 x 100 = ……%

Fermented product

Liquid X


32

2. State the properties of alcohol.

3. State six uses of alcohol

(i) .................................................................................................................................

(ii) …………………………………………………………………………………….

(iii) …………………………………………………………………………………….

(iv) …………………………………………………………………………………….

(v) …………………………………………………………………………………….

(vi) …………………………………………………………………………………….

4. Effects of alcohol on health:

(a) Effects of alcohol on the brain:

PROPERTIES

OF ALCOHOL

Effects on cerebrum

• Disturbs _____________ and _________________ • _________________ and ______________ become impaired

Effects on cerebellum

• Coordinating of

muscles is disturbed, affecting ___________

________________.


33

(b) Effects of alcohol on the nervous system and body organs: Name: …………………………………………… Class : ……. Chapter 4 Exercise 3 Learning Area: Carbon Compounds. Learning Objective: Analysing fats and their effects on health. 1. Fats are organic compounds made up of …………………… , …………………….. and ………………….. . 2. State four differences between saturated fats and unsaturated fats.

Saturated fats Unsaturated fats

(a)

(b)

(c)

(d)

Effects on the liver

• Damages the liver cells causing ____________

______________.

Effects on the stomach

• Alcohol ______________ the internal surface of the stomach to cause __________. In serious cases, __________ is formed.

Effects on the nervous

system

• The reflexes of a drunkard become ______________.

Effects on the skin

• The arteries in the skin ______________

and cause massive __________________ from the body.

Score: …./15 x 100 = ……%


34

3. Name three effects on human health that are caused by excessive consumption of saturated fats. (i) ……………………………………………………………………………………. (ii) ……………………………………………………………………………………. (iii)……………………………………………………………………………………. 4. The diagram shows a change in the lumen size of an artery. What is X? ………………………………………………………………………………… Name: …………………………………………… Class : …… Chapter 4 Exercise 4 Learning Area: Carbon Compounds. Learning Objective: Analysing oil palm and its importance to national development. 1. Diagram 1 shows a cross section of oil palm fruit.

Diagram 1 (a) Label parts Y and Z in Diagram 1. (b) Which part of the oil palm fruit produces the most oil? ……………………………………………………………………………………. (c) Name the process to produce palm oil from the fruit. ……………………………………………………………………………………

Cross section of normal artery

Lumen

Cross section of blocked artery

X

Score: …./25 x 100 = ……%


35

(d) State one advantage of palm oil to health. ……………………………………………………………………………………. (e) Circle the items made from palm oil in Diagram 2 . .

Diagram 2 2. Name the processes in the extraction of oil from oil palm fruit.

Stage Process Methods

1 (i) …………….

Fruits are steamed in hot vapour (steam) to (a) kill bacteria and fungi (b) soften fruits (c) loosen fruits from their bunches (d) stop decomposition of oil

2 (ii) ……………. Removes fruits from the bunches.

3 (iii) …………….

• Crush and digest the oil palm fruit. • Separating the pulp from the shell.

4 (iv) ……………. Oil is extracted from pulp using hydraulic pressure

5 (v) ……………. To sieve out the solid particles

6 (vi) …………….

• Steam flows through oil to remove smell • Palm oil flows through activated carbon to wash

off its colour 3. State the uses of palm oil. (i) ……………………………………………………………………………….. (ii) ……………………………………………………………………………….. (iii) ……………………………………………………………………………….. (iv) ………………………………………………………………………………..


36

4. State the nutritional substances in palm oil. 5. Diagram 3 shows an extraction process of a type of oil in a laboratory.

Diagram 3 (a) In Diagram 3, name stage X. (b) At what stage are microorganisms in the oil palm fruit destroyed? ……………………………………………………………………………………… (c) In the industrial production of the oil, name the stage after the filtration stage.

Nutritional

substances in

palm oil


37

……………………………………………………………………………………… (d) (i) What is M? ………………………………………………………………………………. (ii) Name one vitamin found in M. ………………………………………………………………………………. Name: …………………………………………… Class : …… Chapter 4 Exercise 5 Learning Area: Carbon Compounds. Learning Objective: Analysing the process of making soap from oil and the cleansing action of soap. 1. Diagram 1 shows the process of soap production.

Diagram 1 (a) Name the reaction between coconut oil and the concentrated sodium hydroxide solution.

.................................................................................................................................

(b) How is soap separated from the mixture?

.................................................................................................................................

(c) When the product is tested with red litmus paper, its turn blue. What conclusion can you make from this observation?

…………………………………………………………………………………….

(d) Write a word equation to show the reaction of making soap.

.................................................................................................................................

(e) The soap molecules consist of two portions as shown in Diagram 2.

Glass rod

xxxxxxxxxxxxxxx

Coconut oil +

Concentrated sodium hydroxide solution Bunsen burner

P Q

Score: …./13 x 100 = ……%


38

Diagram 2

(i) Name portion P and Q

P : .....................................................................................................................

Q : ....................................................................................................................

(ii) Which part of the soap molecule will dissolve in oil and grease when we wash our

clothes?

.............................................................................................................................................

2. Diagram 3 shows the cleansing action of soap. Fill in the blank with suitable answer.

Name: …………………………………………… Class : …… Chapter 4 Exercise 6 Learning Area: Carbon Compounds. Learning Objective: Understanding natural polymers. 1. (a) What are polymers?

…………………………………………………………………………………….

(b) Name the process where monomers combine to form polymers.

…………………………………………………………………………………….

(c) Name the process where polymers break down into monomers.

…………………………………………………………………………………….

water

cloth

The __________________ portion of the

soap molecules dissolve in grease whereas

the __________________ portion

dissolves in water.

water

cloth

The movement of water causes the

_________________ portion of the soap

molecules dissolved in the ____________

to be carried. So, the ________________

portion dissolved in _________________

is pulled. The dirt is dislodged.

Diagram 3

Score: …./20 x 100 = ……%


39

(d) What is process P and Q in the diagram below?

(i) Process P : …………………………………………………….

(ii) Process Q : ……………………………………………………

(e) What are natural polymers?

…………………………………………………………………………………….

…………………………………………………………………………………….

(f) Name the monomer of the respective natural polymers.

Natural polymer Monomer

Starch

Protein

Fat

Natural Rubber

Cellulose

2. Diagram 2 shows effect of substance Y on the rubber particles. (a) Name the monomer of latex.

……………………………………………………………………………………

(b) Name substance Y.

……………………………………………………………………………………

(c) State the action of substance Y on the rubber molecules.

…………………………………………………………………………………….

(d) Name the substance used to prevent the coagulation of latex.

…………………………………………………………………………………….

(e) State one characteristic of natural rubber.

Process P

Process Q Monomers (smaller units)

Polymers (Long chain of molecules)

Substance Y Negatively charged membrane

Rubber molecules

Diagram 2

Solid rubber


40

…………………………………………………………………………………….

The production of vulcanized rubber is represented by the equation below.

(f) What is process X?

…………………………………………………………………………………….

(g) Draw a diagram to show the structure of vulcanised rubber molecules in the box provided below. (h) State two advantages of vulcanised rubber as compared with natural rubber.

(i) ………………………………………………………………………………..

(ii)………………………………………………………………………………..

Solid rubber Vulcanised rubber Process X


41

Name: …………………………………………… Class : …… Chapter 4 Exercise 7 Learning Area: Carbon Compounds. Learning Objective: Understanding natural polymers. 1. Diagram below shows an experiment to compare the elasticity of a natural rubber, (Rubber P) with a

natural rubber that has been soaked in sulphur monochloride solution, (Rubber Q). (a) State the hypothesis that can be made from this experiment.

…………………………………………………………………………………….

(b) State the variable in this experiment.

(i) Controlled variable: ……………………………………………………………

(ii)Manipulated variable: ………………………………………………………….

(c) Based on this experiment, which rubber is more elastic?

……………………………………………………………………………………

Score: …./14 x 100 = …….%

Diagram 3


42

(d) Mark ( � ) the objects which are made of natural rubber that has been processed as in rubber Q.

2. (a) Based on the above statement, write one suitable hypothesis.

(b) Describe an experiment that you can carry out in a laboratory to prove this hypothesis. Your description should include the following;

(i) aim of experiment

(ii) identification of variables

(iii) list of apparatus and materials

(iv) method

(v) tabulation of data

(vi) conclusion

Tyre Balloon Shoe sole

A rubber planter wanted to sell his latex and rubber. He mixes the latex with an alkali (ammonia) to maintain its liquid form. To produce rubber he mixes the latex with acid (ethanoic acid).


43


44

Name: ………………………………………… Class : …… Chapter 5 Exercise 1 Learning Area: Motion. Learning Objective: Analysing the motion of vehicles on land. 1. The diagram below shows a bicycle. Fill in the boxes with suitable name of the parts given below.

Hub Pedal Sprocket Chain Metal rim brake

2. Diagram below shows a four-stroke engine. Label the diagram completely.

Score: .…./10 x 100 = …….%

Crankshaft

Exhaust valve


45

Name: ………………………………………… Class : …… Chapter 5 Exercise 2 Learning Area: Motion. Learning Objective: Analysing the motion of vehicles on land. 1. Diagram below shows the stages (not in correct sequence) in the operation of a four-stroke engine. (a) On the diagram, name strokes A,B, C and D. (b) Write the correct sequence of the operation of this engine.

…………………………………………………………….

(c) (i) What type of fuel is used in this engine?

………………………………………..

(ii) Give reasons for your answer.

…………………………………………………………………………………………..

Score: .…./24 x 100 = ……. %

A: ………………………

B: ……………

C: ……………

D: ……………


46

2. Diagram below shows the operation for each stroke of a four-stroke petrol engine. Study the diagram and fill in the blanks with suitable answer.

(a) INDUCTION STROKE: (i) Inlet valve ………………..

(ii) Exhaust valve ……………

(iii) …………………………. enter the cylinder.

(iv) Piston moves ………………….

(b) COMPRESSION STROKE: (i) Inlet valve ………………..


(iii) Piston moves ………………….

(iv) Mixture of air and petrol are ………………..

(c) POWER STROKE: (i) Inlet valve ………………..


(iii) The mixture of air and petrol are …………

(iv) The pressure produce from the hot air pushes

the piston ………………..

(d) EXHAUST STROKE: (i) Inlet valve ………………..


(iii) Piston moves ……………..

(iv) Piston pushing out ……………………..

through the ………………. valve.


47

Name: …………………………………………… Class : …… Chapter 5 Exercise 3 Learning Area: Motion. Learning Objective: Analysing the concepts of speed, velocity and acceleration. 1. State correct definition for each of the following quantities:

Quantity Definition

(a) Distance

(b) Displacement

(c) Speed

(d) Velocity

(e) Acceleration

2. Diagram 1 shows the motion a car moving along a road in a straight line. Diagram 1 Fill in the blank to describe the motion of the car:

(a) The ………………... of the car increases.

(b) The car is said to be …………………………….. 3. Complete the sentence below by filling the blank with suitable word.

(a) When the ……………….. of an object increases, it is accelerating.

(b) When the ……………….. of an object decreases, it is …………………..

(c) When the velocity of an object remains ………………… , it is having zero …………….. 4. Diagram 2 shows an experiment is carried out to determine the speed of a trolley that is moving down a runway.

Diagram 3 shows a ticker tape that has been obtained from the movement of the trolley.

Score: .…./16 x 100 = ……. %

20 m s-1 50 m s-1

Trolley

Runway

Ticker timer

Power supply

Ticker tape

Diagram 2


48

Table 1 shows information about the ticker tape above.

Section of the ticker tape 1 2 3 4

Length of section / cm 2.0 3.0 4.0 5.0

Table 1 (a) Using Table 1, draw a bar chart on the graph paper below.

(b) Using your bar chart in (a), state the type of movement made by the trolley.

……………………………………………………………………………..

(c) Calculate the velocity of the trolley for Section 3 of the ticker tape.

0.1 second 0.1 second 0.1 second 0.1 second

Velocity =

=


49

Name: …………………………………………… Class : …… Chapter 5 Exercise 4 Learning Area: Motion. Learning Objective: Understanding the concept on inertia. 1. Diagram below shows an experiment to study the effect of different masses on the time taken to stop the swinging of an object.

Wooden blocks A, B and C are swung from the same height and then released simultaneously. The time taken for each wooden block to stop swinging is recorded.

The results of the experiment are shown in the table below.

Mass of wooden block / g

200 400 600

Time taken to stop the swinging / minute

5.0

15.0

(a) State the manipulated variable in this experiment.

………………………………………………………………………………………………

(b) Based on the table above, (i) predict the time taken for wooden block B to stop swinging. Complete the table above.

(ii) state the inference that you can make.

…………………………………………………………………………………………. …………………………………………………………………………………………

(c) State one method to fix the controlled variable in this experiment. ………………………………………………………………………………………………

(d) What happens to the swing of wooden block A if the length of the string is increased? ……………………………………………………………………………………………….

Score: .…./7 x 100 = …….%

50 cm 50 cm 50 cm

200 g 400 g 600 g

Wooden block A

String

Wooden block B

Wooden block C

……….


50

(e) Which object has the largest inertia? Tick [√] Explain your answer.

………………………………………………………………………………………………

Name: …………………………………………… Class : …… Chapter 5 Exercise 5 Learning Area: Motion. Learning Objective: Applying the concept of momentum 1. Complete the text below. Use the words given in the box. An object which is ………………… possesses momentum. The momentum of an object is

defined as the product of its ………………. and ………………… . The SI unit of momentum

is the …………….. or …………… . The momentum of an object depends on its mass and

velocity. The ……………. the mass of an object, the bigger its ……………………. The

………………. the velocity of an object, the smaller its momentum. Momentum is a

…………… quantity because it has both ………………… and ………………..

Score: .…./16 x 100 = ……%

bigger N s smaller vector

momentum mass kg m s-1 velocity

magnitude moving direction


51

2. Calculate the momentum:

(a)

(b)

3. State three applications of momentum in everyday life.

(i) …………………………………………………..

(ii) …………………………………………………..

(iii) ………………………………………………….

Name: ……………………………………………… Class : …… Chapter 5 Exercise 6 Learning Area: Motion. Learning Objective: Synthesizing the concept of pressure. 1. Complete the diagram below.

20 m s-1

500 kg

Momentum =

=

4 m s-1 3000 kg

Momentum =

=

Score: .…./14 x 100 = …… %

PRESSURE

Definition

Pressure is defined as …………

per unit ……………

Formula:

Pressure =

SI unit: ……………..

Application in everyday life

Large pressure Small pressure

(i) ……………

(ii) …………….

(iii) ……………

(i) ……………

(ii) …………….

(iii) ……………

Example


52

2. Diagram 1 shows an experiment to study the pressure produced by metal blocks, X and Y of the same mass.

Diagram 2 shows the effect on the plasticine when metal blocks, X and Y were dropped.

(a) What is the controlled variable in this experiment?

………………………………………………………………………..

(b) Based on Diagram 2, write down one observation on the plasticine.

…………………………………………………………………………………………………

(c) State one inference that can be made based on the observation in Diagram 2.

………………………………………………………………………………………………….

(d) Metal block Z in Diagram 3 has the same mass as metal blocks, X and Y.

Draw the depth of dent produced on the plasticine when metal blocks, X, Y and Z were dropped together from the same height.

Metal block Y

Metal block X

Plasticine

Diagram 1

Diagram 2

Metal block X

Metal block Y

Metal block Z

Diagram 3


53

Name: ………………………………………… Class : …… Chapter 5 Exercise 7 Learning Area: Motion. Learning Objective: Applying the principle of hydraulic system in every day life.

1. Diagram below shows a glass sphere with holes filled with water. Draw the direction of the water shooting out from the holes when the piston is pushed inwards. Complete the text below.

When the …………….. is pushed into the glass sphere, the water is …………… out in

………. directions with the same ……………… This shows that the …………….. applied

on the water is transmitted ……………….. in all directions. This principle of ……………….

of pressure in liquids is called …………………………….

Pascal’s principle states that a change in …………….. applied to a fluid is transmitted

……………….. in …………… directions.

2. Diagram below shows a simple hydraulic system.

(a) State relationship between pressure on piston X and pressure on piston Y.

………………………………………………….

(b) Complete the equation below:

3. State applications of the Pascal’s principle or hydraulic principle.

(a) ……………………………………………..

(b) ……………………………………………..

Score: …../24 x 100 = …… %

Water

Piston

pushed

Force on X = Force on Y Area on ..... Area on …..

Piston X Piston Y

Liquid


54

4. Diagram below shows a simple hydraulic jack. Write the correct label in the boxes provided.

5. Diagram below shows the hydraulic brakes system in a car. Write the correct label in the boxes provided.


55

Name: …………………………………………… Class : …… Chapter 5 Exercise 8 Learning Area: Motion. Learning Objective: Analysing the motion of vehicles in water. 1. Complete the text below. Use the words given in the box. Animals and objects which move in water must have a shape which gives low

…………………… to the water. It is observed that the best shape for moving through water is

the ………………………… shape; ………………… in the front and ………………. at

the back. This shape causes the …………….. of water to be ………………… and the

resistance to motion is at its ……………………. Fish, …………………………., torpedo and

…………… have streamlined bodies so that they offer ……………… resistance to the water.

2. The diagram below shows a submarine cruising on the surface of water. Fill in the blanks with the words given below. (a) (i) Name the forces acting on the submarine. (ii) For the submarine to float on the surface of water, the ………………….. must be

equal to the …………………………

(b) For the submarine to sink underwater;

(i) the …………………………….. is filled with water.

(ii) the submarine’s weight ……………………………

(iii) the upthrust is …………………….. than the weight.

Score: …./20 x 100 = ……%

submarine laminar sharp ship

small resistance broader

streamlined minimum flow

lower higher weight ballast tank

upthrust increases sucked out decreases


56

(c) For the submarine to move up to the surface of water:

(i) the water in the ballast tank is ………………………

(ii) the ballast tank is now filled with air.

(iii) the submarine’s weight ……………………………

(iv) the upthrust is …………………….. than the weight.

Name: ………………………………………… Class : ….. Chapter 5 Exercise 9 Learning Area: Motion. Learning Objective: Analysing the motion of vehicles in the air. 1. The diagram below shows the set up of apparatus to study Bernoulli’s Principle. When air flows uniformly through the tube, water rises to various levels in the vertical tubes. (a) Arrange in increasing order, (i) the speed of air flow at points P, Q and R. ………………………………………………………………………………. (ii) the pressure of air at points P, Q and R. ………………………………………………………………………………. (b) State the Bernoulli’s Principle. …………………………………………………………………………………… …………………………………………………………………………………… (c) Mark the water level of P, Q and R on the diagram above.

Score: …./11 x 100 = ……. %

Direction of air flow P

Q

R

water


57

2. The diagram below shows the shape of cross-section of an aeroplane wing and the air flow around it.

(a) Name the shape of the wing of an aeroplane. …………………………………………………………………………………….

(b) Show the direction of the air flow on the diagram above. (c) (i) Name the force formed at X. ……………………………………………………………………………….

(ii) Draw an arrow on the diagram above to show the direction of the force in (c) (i). (d) X, Y and Z are areas around the wing. (i) Which area has the lowest air pressure? ………………………………………………………………………………..

(ii) Which area has the lowest speed of air? ……………………………………………………………………………….

(e) Name the principle involved. …………………………………………………………………………………… (f) Name the forces that act on the aeroplane in the diagram below.


58

Name: ……………………………………………… Class : …… Chapter 6 Exercise 1 Learning Area: Food Technology and Production. Learning Objective: Analysing the methods and substances used in food technology. 1. Suggest five reasons for processing food

(a) …………………………………………………………………………………..

(b) ………………………………………………………………………………….

(c) …………………………………………………………………………………..

(d) …………………………………………………………………………………..

(e) ………………………………………………………………………………….

2. (a) What is pasteurization?

……………………………………………………………………………..........

……………………………………………………………………………..........

(b) Complete the flow chart below to show what happens during the pasteurization of milk.

(c) State one advantage and one disadvantage of pasteurized milk.

Advantage Disadvantage

MILK

Score: …./18 x 100 = ……%


59

3. Complete the table below:

Method Explanation Example

Canning

Dehydration

Deep freezing

Irradiation

4. Complete the table below:

Function Example

Colouring

Preservative

Emulsifier

Bleach

Flavouring


60

Name: …………………………………………….. Class : …… Chapter 6 Exercise 2 Learning Area: Food Technology and Production. Learning Objective: Analysing ways to improve food production. 1. Cross breeding is used to get a better breed of livestock as a source of food. (a) Name the new variety obtained from the cross breeding. (b) Fill in the blanks with the correct answer.

Score: …./8 x 100 = ……. %

Advantage of the cross-breeding

(i) ………………..

(ii) ……………...

(iii) ………………

Local cow European bull

…………………

X


61

2. Fill in the boxes with the correct answers. Name: …………………………………………… Class : …… Chapter 6 Exercise 3 Learning Area: Food Technology and Production. Learning Objective: Practising critical and analytical thinking when selecting processed food. 1. State the information that should be provided on a food label according to the Food Act of 1985.

(a)

(b)

(c)

(d)

(e)

(f)

2. Tick [ √ ] for the true statement and [ X ] for the false statements.

(a) Food that has expired a couple of days ago is unsafe for consumption.

[ ]

(b) All processed foods must be labelled with the halal logo. [ ]

(c) A dented can may contain bacteria. [ ]

(d) Consuming food that has expired may lead to food poisoning. [ ]

(e) We will not be compensated if we buy expired food [ ]

How does a farmer maintain the fertility of

soil?

(a)

(b) (d)

(c)

Score: …./18 x 100 = ……. %


62

3. Diagram below show a food label which does not contain some information. (a) State three other information which is not mentioned on the label.

(i) ……………………………………………………………….

(ii) ……………………………………………………………….

(iii) ……………………………………………………………….

(b) Identify two food additives in the food

(i) ………………………………………………………………..

(ii) ……………………………………………………………….

(c) Give two harmful effects of the use of food additives in (b).

(i) ……………………………………………………………….

(ii) ……………………………………………………………….

PAPAYA PICKLES

Ingredients: Papaya,water, Sugar,salt,ascorbic acid, Permissible colouring


63

Name: …………………………………………… Class : …… Chapter 7 Exercise 1 Learning Area: Synthetic Materials in Industry. Learning Objective: Understanding synthetic polymers. 1. Classify the following substances into the correct groups.

a) Natural polymer .……………………. .…………………….

.……………………

b) Plastic

……………………. ………………………..

……………………

c) Synthetic rubber

……………………. ………………………

……………………

2. Fill in the blanks with the correct word. (a) Polymers are macromolecules are made up of smaller units called ………………..

(b) Polymers can be divided into two types,

(i) …………………….... are polymers that exist in living things in nature.

(ii) …………………………. are polymers that are man-made by a chemical process in the laboratory.

(c) The process of monomers joining up into a long chain is called …………………………….

(d) The process of polymers breaking up into monomers is called ………………………………

3. Fill in the boxes with the correct words.

monomer polymer polymerisation depolymerisation

Protein carbohydrate Thiokol Bakelite Neoprene polyvinyl chloride Styrene-butadiene rubber (SBR) cotton melamine

Score: …./24 x 100 = …..%


64

4. Complete the table below with the names of the synthetic polymers and its uses.

Polymer Uses

Polyethene (a)………………………..

(b) .................................... Aircraft windows

(c ) ……………………… Raincoat

Polystyrene (d) ……………………..

(e) ……………………….. Parachutes

Styrene-butadiene rubber (SBR) (f) ……………………..


65

Name: …………………………………………… Class : ……. Chapter 7 Exercise 2 Learning Area: Synthetic Materials in Industry. Learning Objective: Understanding synthetic polymers. 1. The diagram below shows substances made from synthetic rubber. Fill in the boxes with the characteristics of the synthetic rubber.

2. Put a tick (√) in the correct boxes to show the characteristics of synthetic rubber.

(a) Resistant to chemicals

(b) Easy to oxidise

(c) Good absorber of sound and pressure

(d) Heat-resistant

(e) Less elastic

(f) Easy to vulcanize

Score: …./18 x 100 = ……%

Difficult to oxidise


66

3. State one use for each of the synthetic rubbers named below, give a reason for your answer.

Synthetic rubber Use Reason

Styrene-butadiene rubber (SBR)

(a) ……………….

Can withstand friction.

Butyl rubber

Container for corrosive chemical.

(b) …………………….

Neoprene

(c) ……………… Does not conduct electricity.

4. Compare and contrast the properties of natural rubber with the properties of synthetic rubber.

Natural rubber Properties Synthetic rubber

(a)………………… Elasticity Less elastic

Melts easily on heating Resistance to heat (b) …………………

(c) ………………. Reacts with organic solvents/acid

No

High Ability to absorb sound (d)…………………

(e) …………………. Oxidation Difficult to oxidize

Easy to vulcanize vulcanization (f) ………………..

5. Tick (√) the item made from synthetic rubber.


67

Name: ……………………………………………… Class : …… Chapter 7 Exercise 3 Learning Area: Synthetic Materials in Industry. Learning Objective: Analysing plastics. 1. State the type of plastic for each substance in the diagram.

Bakelite Epoxy glue Polythene Polyvinyl chloride

2. Match each of the plastics below with its use.

Types of Plastics Use

Polyethene � Disposable foam cups

Polyvinyl chloride � Aircraft windows

Polystyrene � Shirts

Perspex � Floor tiles

Polyester � Plastic bags

Nylon � Fishing nets

Score: …./22 x 100 = …...%


68

3. Classify the following types of plastic into the thermoplastic and thermoset. 4. Draw the molecular structure of thermoplastics and thermoset.

5. The diagram below shows the molecular structure of thermoset. Fill in the boxes with the correct word.

monomer cross linkage

Thermoplastic Thermoset

polyethene perspex polypropylene melamine

bakelite polystyrene epoxy resin polyvinyl chloride (PVC)

Types of plastic

Thermoplastic Thermoset


69

Name: …………………………………………… Class : ……. Chapter 7 Exercise 4 Learning Area: Synthetic Materials in Industry. Learning Objective: Analysing plastics. 1. Fill in the blanks with the correct word.

glide cross linkage cannot prevent moulded soft

Thermoplastic molecules do not have …………...........between the polymers, enabling them

to………….. on top of one another easily when heated. This characteristic causes thermoplastic

to become ………………..and remouldable.

Thermoset molecules have cross linkages between polymers that ……………….

the chains of polymers from gliding on top of one another when heated. The thermoset plastic’s

shape ………………….be changed, after it has been ……………… .

2. The diagram below shows two molecular structures of two types of plastics.

Plastic A Plastic B Write ‘true’ or ‘false’ for each statement. (a) Plastic A is known as thermoplastic. ……………………. (b) The polymer in plastic A can slide over one another easily ……….…..………..

(c) Plastic B can be moulded repeatedly ……………………… (d) Plastic B can dissolve in organic solvents …………………….. (e) Epoxy glue and melamine are examples of plastic B …………………….

Score: …./22 x 100 = ……%


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3. Compare and contrast thermoplastic and thermoset.

Properties Thermoplastic Thermoset

Melting point (a) ……………… High

Can be moulded or recycled Yes (b) …………………

Has cross linkages between molecules (c) ……………….. Yes

Dissolve in organic solvent Can dissolve (d) …………………

Hardness (e) ……………….. Harder

Resistance towards shock Low (f) ………………….

Heat resistance (g) ………………… High

4. The diagram below shows the ability of each plastic to bend. State the types of plastic.

Cannot be bent

Bends easily


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Name: …………………………………………… Class : …… Chapter 7 Exercise 5 Learning Area: Synthetic Materials in Industry. Learning Objective: Analysing plastics. 1. Diagram 1.1 and Diagram 1.2 shows an improper way of disposing of plastic wastes. State two effects of disposing of plastic waste on the environment as shown in Diagram 1.1 and Diagram 1.2.

(a) Disposal of plastics products causes ………………………….. during heavy rain.

(b) Burning of plastics products releases black and ……………….. smoke.

2. State three ways to control the disposal of plastics.

(a) ……………………………………………….

(b) ……………………………………………….

(c) ……………………………………………….

3. Complete the following sentences using the words given.

biodegradable plastic incinerator electrical energy recycling

(a) ………………………… plastic is the best method to control the use of plastic.

(b) …………………… materials should be collected, crushed and buried at a special landfill.

(c) Plastic materials should be burnt in an …………………….with an air scrubbing system before smoke is released into the air.

(d) Use ……………………….. plastic that can be decomposed by microorganisms.

(e) Burning plastic materials produces heat energy for heating purposes or for generating

…………………….

Diagram 1.1 Diagram 1.2

Score: …./10 x 100 = ……%


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Name: …………………………………………… Class : …… Chapter 8 Exercise 1 Learning Area: Electronics and Information and Communication Technology. Learning Objective: Understanding radio waves. 1. Diagram below shows the displacement-distance graph of a wave. Name the parts label P and Q.

P : ………………………….

Q : …………………………

2. Fill in the blanks with suitable word given in the box below.

(a) The ………………….. displacement of particles from its ………………….. position is

called ……………………….

(b) Wavelength is the …………………… between two consecutive ……………….. or between

two consecutive ……………………….. of the wave.

(c) The number of complete …………………… generated in …………… second is known as

…………………

3. Diagram below shows the electromagnetic spectrum.

Gamma rays X Ultraviolet Y Infrared Microwave Z

(a) On the diagram above, fill in the blanks (i) and (ii) with suitable factor.

(b) Identify waves

Score: …./26 x 100 = …...%

Displacement / m

Distance / m

Q

P

crests distance frequency

oscillation troughs amplitude

equilibrium maximum one

(i) ……………………. increases.

(ii) …………………… decreases.


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X : ……………………………… Y : ……………………………. Z : ……………………..

(c) What is the negative effect of extreme ultraviolet rays on our skin?

……………………………………………………………………………………………………

(d) Name two uses of microwave.

(i) ………………………………………………………….

(ii) ………………………………………………………….

4. Complete the text below with suitable word. ……………… waves are suitable for use in ……………………… because it can ……….

very far and as fast as …………………….. They are not easily …………….. by ……………

in their way. Besides they can also carry ……………… waves very far from their source.

Name: …………………………………………… Class : …… Chapter 8 Exercise 2 Learning Area: Electronics and Information and Communication Technology. Learning Objective: Analysing radio communication. Draw the symbol and match the functions of each electronic component in the table.

Electric component

Symbol

Function

1. Capacitor

Used to control the current in any electrical circuit

2. Diode

Store electric charges and discharge them at regular interval when required

3. Inductor

Used to increase or decrease the alternating current voltage of an electrical power supply

4. Transformer

Act as a current amplifier

5. Transistor

Act as an electrical valve, allowing current to flow in one direction

6. Resistor

Use to induce an electromotive force

Score: …./12 x 100 = ……%


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Name: ………………………………………… ..Class : …….. Chapter 8 Exercise 3 Learning Area: Electronics and Information and Communication Technology. Learning Objective: Analysing radio communication. 1. Diagram below shows a schematic diagram of a radio transmission system and radio receiver system. State the functions of each component.

Score: …./24 x 100 = ….. %

Loudspeaker

Demodulator

Antenna / Aerial

(a)

(b)

/ Antenna

carrier waves

radio

carrier waves


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3. Diagram below shows a schematic diagram of a radio transmission system.

(a) On the diagram above, name parts labelled P, Q, R, S, T and U.

(b) There are two types of modulations, amplitude modulation and frequency modulation. Draw the two modulated waves in the spaces below.

P: ........................

Q: ................ R: ................

S: ........................

T: ................

U: ........................

Modulated frequency wave (FM) Modulated amplitude wave (AM)


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Name: …………………………………………… Class : …… Chapter 8 Exercise 4 Learning Area: Electronics and Information and Communication Technology. Learning Objective: Understanding satellite communication. 1. Diagram below shows a Global Satellite Communication Network.

(a) Name X and Y.

(b) How many communication satellites are needed to cover worldwide communication?

………………………………

(c) (i) What type of signals are transmitted by a satellite station to a communication satellite?

……………………………………………………

(ii) Give one advantage of the signals stated in (c)(i).

……………………………………………………………………………………………..

(d) State three types of transmission that can be sent through satellite communication.

(i) …………………………………………………………….

(ii) …………………………………………………………….

(iii) …………………………………………………………….

(e) State two applications of satellite communication.

(i) …………………………………………………………….

(ii) …………………………………………………………….

Score: …./10 x 100 = ….. %

X: ……………………...

Y: ……………………...

Science Form 5 _waja2009

Documents

d microorganisms

growth of microorganisms

useful microorganisms

b c d e

u t e r e

groups of microorganisms

bacteria culture diagram

section b i