science form 1

NAME : ………………………………………………………FORM: …………………

SEKOLAH MENENGAH KEBANGSAANKING EDWARD VII, TAIPING

ASSESSMENT 2/2009FORM 1

SCIENCETIME: 1 HOUR

Answer all the questions.

PART 1 – 20 QUESTIONS (40 MARKS)

1 Which one of the following explains the importance of water?

A to carry nutrients to all cells in the bodyB to produce energy during respirationC as a habitat for earthwormD to provide us with heat

2 Which one of the following does not explain the importance of air?

A For combustionB For respirationC For photosynthesisD To generate electricity

3 Among the following properties of elements, which is matched correctly?

A Iron – can be broken down into two or more substancesB Sulphur – has shiny surfaceC Mercury - freezes at –390CD Copper - melts at 1000C

4 Among the following properties of compounds which is matched correctly?

A Sugar – can be separated by filtrationB Water – chemically combined from hydrogen and oxygen atomsC Rubber – physically combined from carbon and oxygenD Naphtalene – cannot be broken down into two or more substances

5 Among the following properties of mixtures, which are matched correctly?

I Dessert – consists of two or more substances which are physically combined

II Water and oil – can be separated by using separating funnelIII Petroleum – can be separated by distillationIV Alloy – can be separated by electrolysis

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A I. II. III. IVB I. II. IIIC I, II, IVD I, III, IV

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One spatula of iron filling and one spatula of sulphur powder are mixed together to form a mixture as shown in the diagram above.Choose the correct statement to describe the result.

A No new substance is formedB The mixture turned blackC Heat is absorbedD Heat is released

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Which of the following statements is incorrect to describe the final result of the experiment?

A A black coloured substance is formedB Iron filling and sulphur powder are chemically combinedC No new substance is formedD The original properties are completely changed

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2

Choose a mixture that can be separated by using the above method.

A Copper sulphide solutionB Sugar and waterC Salt and waterD Flour and water

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A copper plate can light up the bulb when it is connected to the circuit, suggest another substances that can do the same function I aluminium II silver III iron IV graphite

A I, II, III, IVB I, II, IIIC II, III, IVD 1, III

10 Is light, does not rust and a good conductor of heatUse as framework of planes, drink can, kettle and pans

The above statements are suitable forA mercuryB sulphurC aluminiumD silver

11 Which of the following is/are properties of mercury

I High melting pointII High boiling pointIII Good conductor of heatIV Fragile

A IB I, IIC I, II, IIID I, II, III, IV

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12 Hard, has high melting point, transparent and shinyTo make jewellery and to cut glass

The above characteristics are true for

A Copper B Carbon C Pewter D Gold

13 Air is a ………….A compoundB elementC gasD mixture

14 This gas makes up about 78% of the air. It is very useful for plants to grow well. The gas is ………….

A oxygenB nitrogenC carbon dioxideD inert gases

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What do you see on the external surface of the boiling tube after a few minutes?

A The colourless drops of liquid that change the colour of anhydrous cobalt chloride paper from blue to pink

B The colourless drops of liquid that change the colour of anhydrous cobalt chloride paper from pink to blue

C The colourless drops of liquid that change the colour of litmus paper from blue to red

D The colourless drops of liquid that change the colour of litmus paper from red to blue

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Questions 16 to 18 are based on the diagram below.

16

Why doesn’t water enter the gas jar at the beginning of the activity?

A Air has mass B Air occupies spaceC Air has densityD Air is lighter than water

17 Name the gas needed for the candle to burn

A Hydrogen B Carbon dioxideC OxygenD Nitrogen

18 Name the gas released after the candle extinguished

A Carbon dioxide B OxygenC Inert gasesD Nitrogen

19 The confirmation test for oxygen is …….

A turns lime water milky B turns bicarbonate indicator from red to yellowC very soluble in waterD ignites a glowing wooden splinter

20 When cooking is being done in the kitchen, the window need to be opened to allow fresh air containing ………………….to come in to help combustion.

A Carbon dioxide B OxygenC Inert gasesD Nitrogen

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PART 2 – 60 MARKS

1.

The apparatus shown in the figure above was set up and used in a science activity. Petri dish A is exposed to the air near a window, while Petri dish B is covered with a piece of glass. Observation is recorded after 20 minutes.

a. What is the aim of this experiment?____________________________________________________________ ( 2 marks)

b. State the variables i. Manipulated : _______________________________________________ ii. Constant: __________________________________________________ iii Responding : _______________________________________________

( 3 marks) c. Conclusion : The dust content in A is __________________than B.

( 1 mark)

2. Choose a suitable word from the list given below to fill in the spaces based on the statements.

Mixture element compound molecule atom

a. Smallest particle in element. (…………………..)

b. Substance consisting of only one type of atom. (……………………..)

c. Combination of a group of atoms. (………………….)

d. Substance consisting of two or more elements chemically combined together. (……………………………)

e. Substance consisting of two or more elements physically combined together (………………………..)

( 5 marks)

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3.

The apparatus above can be used to separate a mixture of oil and water.

a. Name the apparatus (________________________)

b. Give two properties of oil that enable it to be separated from water.

i. _____________________________________________________

ii. _____________________________________________________

c. Mixture can be separated physically. Suggest another two physical methods that can be used.i. __________________________________

ii. __________________________________( 5 marks)

4. The diagram shows the components of gases in air.

i. Name gases P, Q, R and S.P : ______________________

Q : ______________________

R : ______________________

S : ______________________

ii. State the confirmation test for oxygen gas.Ignites a __________________________

iii. State the confirmation test for carbon dioxide gas.Turns ________________________cloudy.

iv. Write down the percentage of each gas in the box below

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Name of gas PercentagePQRS

( 10 marks)

5.

The above diagram shows three boiling tubes A, B and C which are left for two hours.

i. What is the aim of this experiment?

_______________________________________________________ ( 2 marks)

ii. State the variable that isa. constant : ____________________________________________

b. manipulated: _________________________________________

c. responding: __________________________________________( 3 marks)

iii. What is the function of apparatus C? ________________________ ( 1 mark)

iv. What will happen to the indicator in A? ______________________ ( 1 mark)

v. Give your reason for the observation in (iv)._______________________________________________________ ( 1 mark)

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vi. What is the function of cotton soaked with sodium hydroxide solution?________________________________________________________ ( 1 mark)

vii. What conclusion can be made?_______________________________________________________ ( 2 marks)

viii. Predict the observation if the cockroach is replaced by boiled green beans.______________________________________________________________

( 1 mark)

6.

P : _______________________________________________________

Q : _______________________________________________________

R : _______________________________________________________

S : _______________________________________________________( 4 marks)

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(b) Classify substances P, Q, R and S in the figure above into two groups based on their common characteristic. Write the letters of the substances belonging to each group.

( 4 marks)

( c) State the process to separate the molecules in P. (_____________________)( 1 mark)

(d) Table salt can be obtained from sea water by ________________excess water from the sea water.

( 1 mark)

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7.

( 12 marks)

KERTAS SOALAN TAMAT

Prepared by

………………….(Pn Hjh Noriah)

Checked by

………………..(Pn Hjh Kamariah)Ketua Panatia Sains

Verified by

………………(Pn Hjh Parizah)

Ketua Bidang

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