Jawapan Soalan Latihan Sains Tahun 4, 5, 6

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moist biscuit ants

L

wire mesh

moist biscuit ants

N

dry biscuitants

M

wire mesh

kLATIHAN SAINS BAHAGIAN B

NAMA : __________________________________ TARIKH : _____________________

TAHUN 4

1. Diagram show an experiment done by year four student?

A. Predict what will happen to plant B after one week.Plant B died / wilted.

B. State one reasons (inference) base on your answer above.Plant B does not get sunlight.

C. In the above experiment, what variables should be kept the same (constant)?Type of plant // Size of plant.

D. What conclusion can be made from this experiment?Plant needs sunlight to grow.

2.

A group of pupils did an investigation about the basic needs of ants. Three containers L, M and N are prepared as shown in the diagram. The containers are left in a room for one week.

A. State one observation about the condition of the ants at the end of the experiment.All ants in container L died.

B. State one reasons (inference) based on your answer above.The ants does not get air to breathe.

C. State the thing that isI changed

Presence of air.II observed

Condition of the ants after one week.D. What can you conclude from the fair test?

Ants / Insects need air to stay alive.

1 azaw/an90/skstjoseph

Plant A Plant B

3. Different sizes of cotton cloth are soaked in water and then taken out. The water that remained in every container is measured. The results are shown in Table below.

kk

A. What is the aim

(purpose) of the investigation?To investigate the relationship between the area of cotton cloth and the volume of water which remained (ml).

B. State one inference (reasons) based on the volume of water which remained in a cloth with the area of 64 cm2?The cloth has the biggest area. / The cloth absorbs the most amount of water.

C. Write one observation to support the reason (inference) in 3 (b).The volume of water remained is the least. // 22ml.

D. State two things that are kept the same in the above activity.I. Initial amount of water. II Type of cloth.

E. State the relationship between what is changed and what is observed.As the area of cotton cloth increases the volume of water which remained decreases.

F. Predict the volume of water that will remain in the container if area of cotton cloth is 81 cm2.7ml

4. Figure shows the apparatus used in a fair test. Three spring with the same size and diameter were hung with three different mass of weight. The lengths of the spring stretch were recorded at the end of the investigation.

A. What is the purpose (aim) of this investigation?To investigate the relationship between the three different mass of weight and the lengths of the spring stretch.

B. State the thing that isI changed:

Mass of weight.II measured:

Lengths of the spring stretch.C. Predict the spring’s length if the load is 200 g.

12cmD. What conclusion can be made from this investigation?

As the mass of weight increase the lengths of the spring stretch increases too.


5100

150

Area of cotton cloth (cm2) Volume of water which remained (ml)

25 55

36 42

49 31

64 22

5. Diagram shows a different number of ice cubes were put into glass K, L, M and N. Each glass having the same amount of water. The volume of water at the end of the activity is shown in Table.

A. State one inference (reasons) based on the volume of water in glass N?The glass was put with the most number of ice cubes.

B. Write one observation to support the reason (inference) in 5 (a).Glass N contains 420ml of water.

C. What is the purpose (aim) of the experiment?To investigate the relationship between the number of ice cubes put into the glass and the volume of water.

D. State two information gathered in this investigation. I. Number of ice cubes put into the glass II. The volume of water.

E. What is the relationship between the two information’s above?As the number of ice cubes put into the glass increases the volume of water

6. Study the set-up in the diagram carefully.

Beaker A Beaker B

A. Predict what will happen to the nail in Beaker A.Nail in beaker A rust.

B. Give your inference (reason) based on your answer in B.Metal rust when it gets contact / exposed with air and water.

F. State two information gathered in this investigation. I. The presence of oil / air.II. Condition of the nail at the end of the experiment.

C. Name two ways to prevent rusting.I Coat the object with grease.II Paint the object.


K L M N

oilwater

boiled wateriron nail

Glass Number of ice cubes Volume of water (ml)

K 1 180

L 2 260

M 3 340

N 4 420

7. Study the diagram.

A. Which planet is conducive for living things?Planet Q

B. Give a reason to support your answer in (a).It has air, water and suitable temperature.

C. What is planet P?Jupiter

D. What is object R?Asteroids

8. Table shows the yield gained after 3 days of harvesting using two different methods.

Harvesting method Land size (hectar)

Human labour 1.5

Harvesting machine 5

A. Write your observation based on the information given. Harvesting using machine can cover bigger land area.

B. State one inference (reasons) based on your observation?Harvesting using machine is faster than human labour.

C. StateI the thing that is kept the same (constant variable) in this investigation.

Size of Land area for havesting.II thing that is measured (responding variable) in this investigation.

Land area cover after three daysIII thing that is changed (manipulated variable) in this investigation.

Harvesting method. // Method of harvesting.D. What conclusion can be made from this investigation?

Harvesting using machine is faster than human labour. // Works become faster / easier when we use machine.

9. Diagram shows the growth of a chilli plant planted by Mahzan in front of his house.

A. What can be observed from the diagram?The number of leaves increases. // The chilli plant have 5 leaves on the 20th day.


Day 1 Day 10 Day 20

Number of days Number of leaves

1 2

10 3

20 5

B. State one inference (reasons) based on the number of leaves?The chilli plant grows.

C. Predict the number of leaves after 30 days.8

D. StateI the things that need to be changed in this investigation.

The number of daysII the things that need to be measured in this investigation.

The number of leaves.E. What is the relationship between the two variables mentioned in (c)?

As the number of days increases the number of leaves increases too.

10. Diagram is a bar chart showing four boxes filled with rubber balls in the sports room.

A. What can be observed in box P?The amount of rubber balls in box P is the least. // Box P can be filled with 10 balls.

B. Write an inference (reason) for the observation in (a).The size of box P is the smallest compared to the others.

C. Calculate the different in number of rubber balls between box Q and box S.20 rubber balls.

D. Based on the statement above what is your reason (inference)?Box S is the biggest in size. // Box S is 160 cm³.

E. What is the trend of the change in the number of rubber balls in the chart.Increases

F. What conclusion can be made from this investigation?As the size of the box increases the number of balls can be filled increases too.


Number of rubber balls

Size of the box cm³

Box S can be filled with the most number of rubber balls.

11. Diagram shows three boys, Fauzi, Muthu and Sam, climbing up a rope.

Table shows the result of the activity.

Boy Mass of boy (kg) Height the boy climb (m)Fauzi 50 3.5Muthu 55 2.5Sam 45 5.0

A. State one reason (inference) based on the height climb by Sam.Sam is the strongest. / Sam has more stamina. / Sam has a strong hand.

B. Write one observation to support your reason (inference) in 11 (a).Sam climbed the highest. / Sam climbs until 5m

C. What is the trend of change in the height that the three boys able to reach as the mass of the boys increases.Decreases

D. Another boy, who weights 60 kg, wants to climb up the rope. Predict the height the boy can reach2m

E. State one relationship between what is changed (manipulated variable) and what is measured 9 responding variable).As the mass of boy increases the height the boy climb decreases.

F. What conclusion can be made from this activity?The heavier the mass of the boy, the lower the height the boy climb.

12. Diagram shows three U shaped magnets.

A. State one reason (inference) based on the number of paper clips attracted to magnet P and R.Magnet R is stronger than magnet P.

B. Write one observation to support your reason (inference) in 12 (a).Magnet R attract 9 paper clips / more paper clips than magnet P.


P Q R

C. StateI the thing that is kept the same (constant variable) in this incestigation.

Type / size / shape of magnets.II thing that is measured (responding variable) in this incestigation.

Number of paper clips attracted to magnet.D. What conclusion can be made from this investigation?

The stronger the magnet the more paper clips attract to the magnet.

13. Three different sizes of wood are used to measure the surface area of a door. The result of the investigation are recorded in the table.

Size of the pieces of wood Number of pieces of wood used

1 cm1 cm

360

3 cm

3 cm

40

6 cm

6cm

10

A. What can be observed from the result of the investigation.The number of pieces of wood used to measured the door used increases. // A pieces of wood with the measured of 6cm X 6cm need only 10 pieces of wood to measured the door.

B. StateI the thing that is kept the same (constant variable) in this investigation.

Size of the doorII thing that is measured (responding variable) in this investigation.

Number of pieces of wood usedIII thing that is changed (manipulated variable) in this investigation.

Size of the pieces of woodC. Diagram shows a piece of wood measured 2 cm X 2 cm.

2 cm

2 cm

Predict the number of pieces of wood used to measure the door.90 pieces of wood

D. What conclusion can be made from this investigation?As the size of the pieces of wood increases, the number of pieces of wood used decreases.


14. Diagram show of each beakers three beakers of different sizes. Diana measured the circumference of each beaker.

Table shows the result of this investigation.

Volume of beaker (ml) 50 100 250

Circumference of the beaker (cm) 15.5 18.0 28.5

A. What can be observed from this investigation?The circumference of beaker R is the biggest / The circumference of the beaker increases.

B. StateI What is changed (manipulated variable) in this investigation.

Volume of beaker (ml)II what is measured (responding variable) in this incestigation.

Circumference of the beaker (cm)C. What is the relationship between the variables stated above.

As the volume of beaker increases the circumference of the beaker increases too.D. The circumference of a beaker S is 35 cm. What can be said about the volume of beaker S?

Volume of beaker S is 300 ml / more than 250 ml / increases.

TAHUN 5

15. A group of student carries out an investigation to study the food relationship between living things. They put a chicken, ten caterpillars and a paddy plant in a container as shown in the diagram.

A. Predict what will happen to the number of caterpillars after two week?The number of caterpillars decreases.

B. What is the reason (inference) to your answer in (a)?The caterpillars are eaten by the chicken.

C. Based on the investigation, state the food relationship between the living things below.I Caterpillars and paddy plant.

The caterpillars eat the paddy plant.D. Identify the producer in the food chain above.

Paddy plant.


circumference

P Q R

16. In an investigation, a piece of roti canai is moistened and then kept in a cupboard. The condition of the roti canai is observed every day for 4 days. The results of the investigation is shown in then diagram.

A. What is the aim of the investigation.To show that microorganisms grow.

B. What is the relationship between the area covered by the moulds and the number of days?As the number of days increases the area covered by the moulds increases too.

C. What can be infer from your answer in (b)?More number of moulds grow on the roti canai after a longer period.

D. What conclusion can be made from the investigation?Microorganisms grow.

17. A group of pupils conducted an investigation on some animals and plants in a cage. The Table below shows the number of plants, praying mantis and frogs in a cage for four days.

G. State one reason (inference) based on the number of frogs throughout the investigation.There is no predator / other animal to eat the frogs. / The frogs have enough food.

H. Write one observation to support your reason (inference) in 15 (a).The number of frog remain the same to the end of the investigation.

I. Predict what can be observed on day 6.The frogs die.

J. Write one conclusion based on the number of plants and the number of praying mantis.As the number of plants decreases the number of praying mantis decreases too.

18. The table below shows the results of a fair test about the growth of a plant.

A. What is the aim (purpose) of this investigation?To investigate the relationship between the number of days and the height of the plant.

B. In this fair test, stateI what is changed (manipulated variable)

Number of daysII what is measured (responding variable)

Height of the plant.


Number of days 1 2 3 4

Number of plants 15 12 8 4

Number of praying mantis 10 7 4 0

Number of frogs 2 2 2 2

Day 3 5 7 9 11 13

Height of plant (cm) 5 8 11 ? 17 20

torchlight

object

shadow

screen

C. Predict the height of the plant on day 9.14cm

D. What can you conclude from the fair test?As the number of days increases the height of the plant increases too.

19. Diagram shows an investigation carried out by a group of Year 5 pupils.

A. Based on the diagram state one observation based on the result of the investigation.The metal ball can go/ slip through the metal ring after the metal ring is heated.

B. What can you infer from your answer in (a)?The metal ring expands when heated.

C. What can be conclude from the investigation?Metal / Matter expand when heated / gain heat.

D. Predict what will be observed when the metal ring is cooled.The metal ball cannot go / slip through the metal ring again.

20. Diagram below shows a fair test carried by a group of Year Five pupils.

The results of the fair test are recorded in this table below.

Distance between an object with torchlight (cm) Size of the shadow formed on the screen (cm)

100 4

80 6

60 8

40 10

20 12

A. State one reason (inference) based on the information?The distance between an object with the torchlight decreases.

B. Write one observation to support your reason (inference) in 18 (a).The size of the shadow formed on the screen increases. // The size of the shadow formed on the screen is the biggest when the object is near to the torchlight.


shadow

Bunsen bunner

screentorchlight

C. What is the aim (purpose) of this investigation?To investigate the relationship between the distance between an object with torchlight and the size of the shadow formed on the screen (cm).

D. What is the trend of the size of the shadow formed on the screen?Increases

E. In this fair test, what things need to beI. changed

Distance between an object with torchlight.II. measured

Size of the shadow formed on the screen (cm).III. kept the same

Shape / Size of the ball. // Size / type of torchlight / source of light.F. Predict the size of the shadow formed on the screen if the distance between an object and

torchlight is 10cm14cm

21. A group of students carried out an activity to study the numbers of chest movement and the running distance .The bar chart below shows the results of the activity.

80 70 60 50

40 30 20 10

20 40 60 80 100

A. What is the purpose of the investigation?To investigate the relationship between the running distance and the numbers of chest movement in one minute.

B. Based on the investigation, state the following that is:I. changed (manipulated variable)?

Running distance / metre II. measured (responding variable)?

The numbers of chest movement in one minute.C. State the relationship between the running distance and the numbers of chest movement in one

minute. As the running distance increases the number of chest movement in one minute increases too.


Running distance / metre

The numbers of chest movement in one minute.

22. Aiman sets up two circuits, X and Y as shown in the diagram below.

A. What is the aim of this investigation.To investigate the relationship between the number of dry cell and the brightness of a bulb.

B. What must be kept the same in this investigation.Type/ Size / Number of dry cell. // Type / Size / Number of bulbs.

C. In what way are circuit X and Y are different? The brightness of the bulbs./ Type of circuits

D. Bulbs in circuit Y are brighter than the bulbs in circuit X. State one inference based on the statement.Circuit X are connected in series but circuit Y are connected in parallel. // Bulbs in circuit Y have its own power / electric supply but bulb in circuit X share the electric / power supply.

E. What will happen if one of the bulbs in circuit X blows?The other bulb does not light up.

F. Give a reason ( inference ) for your answer in ( e ).The circuit is incomplete. Electricity cannot flow through the circuit.

23. Table shows the result of an investigations that was carried out by a girl who placed a wet towel in the Sun and measured its weight at regular intervals.

Time taken ( min ) Weight of towel (g)10 4020 3030 2040 1050 10

A. What is the trend of change in the weight of the towel from the beginning to 40 minutes?Decreases.

B. State one reason (inference) based on your observation on the weight of the towel from the beginning of the investigation to 40 minutes.The water in the towel evaporates.

C. Write one observation to support your reason (inference) in 15 (a).The weight of the towel decreases.

D. StateI what is changed (manipulated variable) in this investigation.

Time taken.II what is measured (responding variable) in this investigation.

Weight of towel.E. What can be conclude from this investigations?

As the time taken increases the weight of the towel decreases.


24. Ani carried a fair test to investigate factor effecting evaporation. She put 20ml of water using the same type and size of containers. The containers are put at 3 different places. The time taken for the water in each in each container evaporates completely is shown.

A. What is the purpose of the investigation?To investigate the relationship between places to put the containers and the tine taken for the water to evaporates.

B. In the fair test, stateI what is changed (manipulated variable)?

Place to put the containers.II what is kept the same (fixed variable)?

Type / size of containers. // Initial amount of water.III what is measured (responding variable)?

Time taken for the water in each container to evaporates.C. Predict the time taken if the beaker is placed in an air-conditioned room

More than 45 minutes.

25. Adib and Carmen place a wooden stick vertically into the ground. The length of the shadow formed is measured and recorded throughout the day.

8:00 a.m. 10:00 a.m. 12:00 a.m. 2:00 p.m. 4:00 p.m.0

20

40

60

80

100

Length of the Shadow (cm)

Time

A. State the aim of the investigation.To investigate the relationship between the time taken and the length of the shadow.

B. State the trend in the length of the shadow in the investigation.Decrease then increase after 12:00 p.m.

C. Give an inference to explain your answer in (b)The Earth rotates from west to east.

D. Based on the investigation, state the following that is:I measured (responding variable)?

Length of the shadow.II changed (manipulated variable)?

Time taken.D. What can you conclude from this investigation?

As the time taken increase the length of the shadow decrease then increase after 12:00 p.m.


At room temperature45 minutes

Under the fan30 minutes

Under the sun10 minutes

26. A group of pupils carried out an activity using model cars to find the relationship between speed and the number of dry cell. The bar chart below shows the result they have obtained.

2 4 6 8 10 1201234567

Speed(/sm)

Number of dry cell

A. What is the aim (purpose) of the investigation?To investigate the relationship between the number of dry cell and the speed of the model cars.

B. State :I what is changed (manipulated variable)?

Number of dry cellII what is observed (responding variable)?

Speed of the model cars.C. What can you say about the speed of the model car with 12 dry cell.

It received the most electric energy / power supply. D. Write one observation to support the reason (inference) in 17 (b).

It have the most number of dry cell / 12 dry cell.E. What conclusion can you make based on the bar chart?

As the number of dry cell increases the speed of the model cars increases too.

27.

Three empty boxes are placed on the table. Kamarul blows each box one after another to find the time taken for boxes to fall. The results are shown in the table below.

Quantity of Boxes Time Taken for the box to fall ( s )1 12 43 7

A. State one reason (inference) based on the time taken for the one box to fall?It has the smallest base area. / It is lighter than the other boxes. / Less stable.

B. Write one observation to support your reason (inference) in 12 (a).The time taken for 1 box to fall is 1second. / It is the fastest to fall.


C. What is the aim of this experiment?To investigate the relationship between the quantity of boxes and the time taken for the box to fall.

D. What is kept the same in this investigation?Size of box. / Shape of box./ Mass / Weight of box.

E. Predict the time taken when the quantity of boxes is 4 ?10 second.

F. What you can conclude from the fair test?As the quantity of boxes increases the time taken for the box to fall increase too.

28. Diagram shows an investigation carried out by a group of pupils.

A. What can be observed it cardboard P is moved 8 cm to the left of its position?The light from the torch cannot be seen through the holes of the cardboard.

B. Give one reason ( inference ) for your answer in (a).The light is blocked by cardboard P.

C. Based on questions (a) what is change in this investigation?The position of the cardboard.

D. What is the conclusion of this investigation?Light travels in a straight lines.

29. Meng investigated the rate of the evaporation of water under three different conditions. He poured 20ml of water into each of the three plates and put them in three different places for 25 minutes. Table shows the result of investigation.

Place to put the plates Amount of water left.Under the Sun NoneUnder the tree Little

Inside the garage Plenty

A. What can be observed from the investigation?The water left under the Sun evaporates faster than other places.Different place to put the plates of water have different rate of evaporation.The plates left under the Sun have on water left.

B. State a reason to support your answer in (a).The water that is left under the Sun gained more heat than other places.

C. State two factors studied in this investigation.I Place to put the plates.II amount of water left.

D. What can you conclude from the above investigation?Water evaporates faster when there is more heat.Different surrounding temperature have different rate of evaporation.


30. A group of pupils carries out an investigation. They build three model of bridges, X, Y, and Z with the same shape but different type of materials. Then, they place a weight on each model as shown in diagram below. They add more weights to see which bridge can support more weight.

AA. What is the aim of this investigation?

To investigate the relationship between type of materials and the number of weight can be support by the bridge.

B. Based on your observation, which bridge has the strongest structure?Bridge Z

C. Give one reason (inference) for your answer in (b)Bridge Z is built by using a stronger material.

D. In this investigation,I. what is changed?

Type of materialsII what is observed?

Number of weight can be support by the bridge.

31. Ariel tested two different substances using litmus paper as shown in diagram below. Table shows the result of the investigation.

SubstancesColour change of litmus paper

Red Litmus Paper Blue Litmus Paper2 No change No change3 No change Turns red

A. What is the aim (purpose) of the investigation?To investigate the relationship between types of substances and the colour change of red and blue litmus paper.

B. Based on the result of the investigation, what is the property ofI distilled water?

NeutralII pineapple juice?


Bridge X Y Z

Number of weight can be support by the bridge 2 pieces 4 pieces 6 pieces

AcidicC. What can you say about the taste of pineapple juice?

It tastes sour.D. Give one example of another substance that has the same property as distilled water.

Cooking oil / sugar / salt.

32. Diagram shows the condition of electric cables observed by a pupil at two different times.

A. What is the aim (purpose) of this investigation?To show the expansion and the contraction of electric cables at different times.

B. Give one reason for the condition of the electric cables at :I 1.00 p.m.

The electric cables expand / become loose when it gain heat / the weather is hot.II 9.00 p.m.

The electric cable contract / become taut when is release heat / the weather is cold.C. In this investigation,

I what is kept the same?Type of electric cables. / Length of electric cables.

II what is observed?Condition of the electric cables.

33. Diagram shows a dough of bread. The following are the ingredients for making the dough.

A. Predict what will happen to the dough after one (1) hour.The dough rises.

B. What is the explanation for your answer in (a)?The yeast in the dough breathe.

C. What is the conclusion of this investigation?Microorganisms breathe.

D. Which type of microorganism do yeast belong to?Fungi.


1 cup of flour ½ cup of warm water 1 teaspoon of sugar 1 teaspoon of dried yeast.

34. Diagram shows an investigation on the heating of water. The height of the water level in the glass tubing is recorded every 5 seconds. Table shows the results of the experiment.

A. State one inference (reasons) based on the height of water level in this investigation.The height of the water level increases because the water expand as it gain heat.

B. Write one observation to support the reason (inference) in 20 (a).The height of the water level rises. / the water level rises from 10 to 50cm

C. State …I what is changed

The time taken to heat the waterII what is measured

The height of water level.D. Predict the height of the water level at the 30th second.

60cmE. What conclusion can be made in this investigation?

As the time taken to heat the water increases the height of water level increases too.

35. Diagram shows an investigation about the ability of objects to conduct heat.

Diagram shows the result of the investigation.


Objects

Group SGroup R

Glass rod Pencil Plastic ruler Cotton cloth

Steel spoon Aluminium rod Tin strip Copper rod

Time (seconds) 5 10 15 20 25

Height of water level (cm) 10 20 30 40 50

A. State the aim of this investigation.To show the ability of an object to conduct heat.

B. State one inference (reason) based on your observation.Objects in group R are insulators of heat. Objects in group s are conductors of heat.

C. What will happen to objects in group S when they are immersed into the hot water?Objects in group s become hot.

D. Give one reason for your answer above.Metal objects is a good conductor of heat.

E. What conclusion can be made in this investigation?Objects made of metal conduct heat (conductors). / Objects made of plastic / wood / cloth cannot conduct heat (insulators)

36. An investigation is carried out for 6 month to find out the effect of the brushing habit on tooth decay. Table shows the findings.

Number of times the teeth are brushed in a day

Number of decaying teeth in 6 months.

3 02 11 20 3

A. State an observation from this investigation.The number of decaying teeth in six months increases.

B. Give one reason (inference) for your observation in A.Microorganisms / bacteria grow / spread faster when we don’t brush our teeth.

C. StateI the thing that is kept the same (constant variable) in this investigation.

Number of month. / Period of investigation. II thing that is measured (responding variable) in this investigation.

Number of decaying teeth in 6 monthsIII thing that is changed (manipulated variable) in this investigation.

Number of times the teeth are brushed in a dayD. What conclusion can be made from this observation?

As the number of times the teeth are brushed in a day decreases the number of decaying teeth in 6 months increases.

TAHUN 6

37. Pots labeled P and Q are planted with a different number of seeds. Diagram shows the condition of the seedlings at the end of the investigation.

A. State one observation about the characteristic of the seedling in pot P.


The stem / leaf are bigger. / It has more leaves.B. State one reason (inference) for your answer in (a).

Seedlings in pot P does not compete for water, nutrients and space.C. State

I what is change (manipulated variable) in this investigation?The number of seedlings

II what is measured (responding variable) in this investigation?Size / height of the seedlings. // Size of the stem. // Number of leaves.

D. What conclusion can be made from this investigation.Plants grow healthier when it does not compete for nutrients and water. //Plants grow healthier / taller / bigger when is has less completion for nutrients and water.

38. Diagram shows two wooden blocks of the same mass being pushed on two different types of surfaces by Rani with the same amount of force. The distance that the object travels is measured and recorded in the Table below.

A. What is the purpose (aim) of this investigation?To investigates the relationship between the type of surface and the distance that the wooden block (cm).

B. StateI what is change (manipulated variable) in this investigation?

Type of surfaceII what is kept the same (constant variable) in this investigation?

Shape / Masses / size of wooden block. // Amount of force.III what is measured (responding variable) in this investigation?

The distance that the wooden block travels (cm).C. State the relationship between the type of surface and the distance the wooden block travels.

As the type of surface is smoother / rougher the distance that the wooden block travels increases / decreases.The smoother / rougher the type of surface the further / nearer the distance that the wooden block travels.

D. Predict the distance if the wooden block is push on a piece of plywood.Any answer in between 51 and 89. // Nearer than on a glass. // Further than on a carpet.

39. In year 2003, many factories are built around Tasik Besar. Table shows the number of fish found living in Tasik Besar from 2004 to 2008.


Type of surface Glass Carpet

The distance that the wooden block travels (cm)

90 50

Year 2004 2005 2006 2007 2008

Number of fish 4625 3125 2425 1525 625

A. State one reasons (inference) based on the observation in the number of fish in this investigation.Water in Tasik Besar is polluted by waste materials from the factories.

B. StateI what is kept the same (constant variable) in this investigation?

Place of investigation // The lake // Tasik BesarII what is measured (responding variable) in this investigation?

Number of fish.C. Suggest one way to allow the number of fish in the lake to increase?

The factories must not be allowed to dump their waste into the lake.D. State one observation based on the quality of air around the lake as the fish becomes less.

The air is polluted by the fumes / smoke from the factories. // The air smells of rotting fish.

40. Diagram is a bar chart showing the time taken by five pupils to finish a 100 m race.

A. StateI what is kept the same (constant variable) in this investigation.

The running distance. // Distance of the raceII what is measured (responding variable) in this investigation?

The time taken ( to finish the 100m race.)B. What can you say about Nasyitah during the race?

Nasyitah won the race. // Nasyitah is the fastest girl in the race. // C. Give one reason (inference) about your observation.

Nasyitah take the shortest time to finish the race.D. State the speed of Nabilah during the race.

5m/s

41. Mary has carried out an investigation on two cubes of papaya. Each cube is put separately into different bottles, P and Q. Bottle P filled with 200ml of tap water, while bottle Q is filled with 200ml of vinegar. One week later, she recorded her findings as shown in Table.

A. What is the purpose (aim) of this investigation?To investigates the relationship between the type of liquid and the condition of papaya cube.

B. The papaya cube in bottle Q is still edible. State one reason (inference) based on this observation.Microorganism is not active / cannot grow in vinegar / acidic condition.


Bottle P Q

Type of liquid Tap water Vinegar

Condition of papaya cube Rotten Edible

C. State another observation for the papaya cube in bottle P.It smells bad.

D. What conclusion can be made from this investigation?Pickling can help to preserve papayas.

42. Diagram shows the position of the Earth, the Moon and the Sun.

A. State the type of eclipse that occurs.Eclipse of the Sun.

B. State one observation during the formation of the eclipse.The surrounding becomes darker.

C. Give one reason (inference) about your observation.The Moon blocks the sunlight from reaching the Earth.

D. How long does the eclipse normally last?A few minute.

E. State the time for the occurrence of the above eclipse. During daytime.

43. Diagram shows an investigation that is carried out to find out whether machines are useful to us. First, a boy tried to carry up as many pails of water from a well as he can in 3 minutes without using a pulley. Then, he repeated the same activity by using a pulley. Table shows the result obtained.

A. Write one observation based on the effect of the pulley on the boy’s work.The boy can carry more pails of water using the pulley.

B. State one reason (inference) based on your answer in (a).The pulley enables / help the boy to use less effort in his work. // Pulley makes work easier.

C. StateI what is change (manipulated variable) in this investigation?

Way to carry up the pail.II what is measured (responding variable) in this investigation?

Number of pails of water.D. What conclusion can be made from this investigation?

Pulleys / Machine can help us to do work faster / easier / with less effort.


Way to carry upthe pail

Number of pails of water

Without using pulley 7Using pulley 12

44. Diagram shows two pots of plants, pot P and pot Q, that were planted a week ago. Pot P and pot Q are of the same size.

A. State two reasons (inference) about the differences between the plants in pot P and plant in pot Q.I plant in pot P have greater competition for water.II plant in pot P have greater competition for nutrients.

B. Write two observation about the plants in pot P and pot Q after a week.I Plant P has less number of leaves than plant QII Stem of plant P is thinner. / Plant P is shorter than plant Q.

C. State the thing that is kept the same (constant variable) in this incestigation.I Type of plant / soil.II Size of pot.

D. What conclusion can be made from this investigations.Plants grow healthier when it does not compete for nutrients and water. //Plants grow healthier / taller / bigger when is has less completion for nutrients and water.

45. A group of pupils carried out an investigation to study the condition of the body coverings of the polar bear and the camel which are living in different habitats. The following are reports of the investigations.

A. Give one reason to explain the differences in the body coverings of these animals.The polar bear lives in a cold climate while the camel lives in a hot climate.

B. Besides the differences in the body coverings of these animals, give another observations to support your answer in (a).The polar bear is bigger in size / carrying more fats and the camel has a hump.

C.

Make a suitable relationship based on the above statements.As the thickness of the hair layer covering body increases the quantity of heat loss from the body decreases.


The thickness of the hair layer on the skin affects the quantity of heat loss from the body.

46. Table shows information’s gathered from an investigations. A pencil is placed behind three different objects and the ability to see the image of the pencil is recorded.

A. What can you infer about the ability to see the image of the pencil behind the glass.Glass allow light to pass through

B. Write one observation to support your answer in 40 (a)?The image of the pencil can be seen very clear.

C. State :I. What is changed (manipulated variable)?

Type of objects.II. What is observed (responding variable)?

The ability to see the image of the pencilD. Predict the image of the pencil that can be seen if the object replaced with a blue plastic.

The image of the pencil is not very clear.

47. Diagram shows two cages, P and Q, of the same size. A chick is placed in cage P, while three other chicks are placed in cage Q. An equal amount of food and water is given to the chicks in each cage, for a period of one month.

After a month, the observation on the conditions of the chicks are as follows :

A. State one reason (inference) based on the observation about the :I. chicks in cage P.

Chicks in cage P gets enough food and water. / The chicks have no competition for food and water.

II. chicks in cage Q.Chicks in cage Q does not gets enough food and water. / The chicks have greater competition for food and water.

B. StateI what is kept the same (constant variable) in this investigation.

Amount of food and water / Initial size of the chicks / The size of the cage / Period of investigation.

II what is measured (responding variable) in this investigation.The size of the chicks after one month.

III what is changed (manipulated variable) in this investigation. The number of chicks.

C. State the relationship between the number of chicks and the competition for water and food.As the number of chicks increases the competition for food and water increases too.


P - size of the chicks increases. / Q - Size of the chicks remains the same.

Types of objects The ability to see the image of the pencil

Glass Clear

Tracing paper Not very clear

Book Cannot be seen

48. Swee Lan heats up a beaker of water. She takes the temperature of the water every two minutes. After 14 minutes of heating, she leaves the beaker of water to cool. She also records the temperature of water every two minutes. Diagram shows the changes in the water temperature.

A. State the observation about the changes of water temperature shown in P and Q.P shows the water temperature increases, while Q shows the water temperature decreases.

B. State one reason (inference) for your answer in (a).P shows the water gain heat, while Q shows the water loses heat.

C. StateI what is measured (responding variable) in this investigation.

Temperature of water.II what is changed (manipulated variable) in this investigation.

Time taken.D. What conclusion can be made from this investigation.

As the time taken increases the temperature of water increases then decreases. / The water temperature increases when it gains heat and decreases when it loses heat.

49. Mary has carried out an investigation on two cubes of papaya. Each cube is put separately into two bottles of the same size, P and Q. Bottle P is filled with 200 ml of tap water, while bottle Q is filled with 200 ml of vinegar. One week later, she recorded her findings as shown in table.

A. What is the purpose (aim) of this investigation?To show that how papaya can be preserved. / To investigate the relationship between type of liquid to keep the papaya cube and the condition of papaya cube after one week.

B. The papaya cube in bottle Q is still edible. State one reason (inference) based on this investigation.Microorganisms is not active / cannot grow in vinegar.

C. State another observation made from the papaya cube in bottle P.25 azaw/an90/skstjoseph

P Q

Bottle P Q

Condition of papaya cube Rotten Edible

It smells bad.D. State what is observed (responding variable) in this investigation.

Condition of papaya cube after one week.E. What conclusion can be made from this investigation?

Pickling can help to preserve papayas. / to keep fruit to last longer.

50. Zaki carried out an investigation as shown in diagram. Zaki tried to lift the maximum load that he can, using the set-ups shown below. The result of this investigation is recorded in Table below.

A. Give one reason (inference) based on the result of set-up A and B in Table.The position of wooden block in set-up B is nearer to the load.

B. Write one observation to support your answer in 50 (a)?Set-up B can lift up 16 kg.

C. StateI what is kept the same (constant variable) in this investigation.

The amount of effort / force.II what is measured (responding variable) in this investigation?

The amount of load that can be lifted.D. State the type of simple machine shown in set–up B.

LeverE. What conclusion can be made from this investigation?

Levers can help us to lift heavy loads. / The nearer the fulcrum (wooden block) to the load the easier to lift the load.

LATIHAN TAMATSEMOGA ANDA BERJAYA DENGAN CEMERLANG


Set-up A B

The amount of load 10 kg 16 kg

Jawapan Soalan Latihan Sains Tahun 4, 5, 6

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