It Sci Y5 Topical Test 6

TOPICAL TEST 6 : LIGHT / HEAT Section A This question paper consists of 25 questions. Answer all questions. Every question is followed by four options A, B, C and D. Choose the correct answer. UNIT 6 1 Diagram 1 shows an activity that is carried out by a group of pupils.

5 Diagram 4 shows a position of a matchstick under sunlight.

Diagram 1

Pupil J can see the light whereby pupil K cannot see the light. What can be concluded based on the activity? A Light can be seen. B Light travels in a straight line. C Pupil K has eye problem. D Pupil J has a very clear vision.

Diagram 4

Which of the following would be the shadow in the evening? A C

2 Diagram 2 shows the shadow formed when light is shone on an object.

B

D

Diagram 2

Which of the following explains the formation of shadow? A Light can be bent. B Light can be refracted. C Light can be travelled in different way. D Light cannot pass through opaque objects.

6 A shadow is formed when light is shone on an object. Which of the following can increase the size of the shadow? I Object is moved nearer to the light source. II Object is moved farther from the screen. III Object is moved nearer to the screen. IV Object is moved farther from the light source. A I and II C II and IV B I and III D III and IV

3 Which of the following shows the reflection of light from a mirror? A C

7 Diagram 5 shows the side mirror of a car. B

D

Diagram 5

A car driver can see the other cars coming from behind.The side mirror of a car applies the principle that light A can pass through opaque objects. B travels in a straight line. C can be refracted. D can be reflected.

4 Diagram 3 shows a boy uses a periscope to see a girl.

8 Ahmad unable to see the tree through his bent roll paper because A light is reflected. B light does not exist. C light moves in different. D light travels in straight line.

Diagram 3

Which of the following devices works on the same principle as the periscope? A Kaleidoscope C Microscope B Magnifying glass D Stethoscope

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9 Diagram 6 shows an investigation carried out by a group of pupils.

B K and M

D L and N

15 Diagram 8 shows part of a thermometer.

Diagram 6

Diagram 8

At which positions S, T, U or V should the object be placed to get the smallest shadow? A S C U B T D V

The temperature is A 32°C B 33°C

C 34°C D 35°C

16 Diagram 9 shows cold water in a beaker being heated.

10 Which of the following statements are true about light? I Light is a form of energy. II Light travels slower than sound. III Light can travel in a straight line. IV Light can pass through everything. A I and II C II and III B I and III D III and IV

Diagram 9

It is observed that the water becomes warmer after 3 minutes. State one reason (inference) which explains why the cold water becomes warmer. A Water can become warmer. B Water becomes warmer in 3 minutes. C Water gives out heat energy when heated. D Water becomes warmer when it gains heat.

UNIT 7 11 Diagram 7 shows a torch shining on an object.

Diagram 7

17 Table 2 shows the temperature of four objects.

Which of the following shadow formed of the screen? A C B

Object

W

X

Y

Z

Temperature (°C)

90

18

72

54

D

Table 2

Which of the following shows the correct sequence of the objects from the coldest to the hottest? A X, Y, Z, W C W, X, Z, Y B X, Z, Y, W D W, Y, Z, X

12 Table 1 shows the result of an investigation. Height of light resource (cm)

4

Length of the shadow (cm)

15

6

8

10

9

6

18 A cup of hot tea left on a table. The tea becomes cooler after being left on the table for a few minutes. What can be concluded from this observation? A The tea lost heat. B The tea absorbed heat. C The tea was left too long. D The tea was not hot enough.

Table 1 Predict the length of the shadow when the light source is 6 cm high. A 16 cm C 9 cm B 12 cm D 5 cm

19 Table 3 shows the result of an investigation where a beaker consisting of water was heated. The temperature of the water is recorded for every 3 minutes.

13 Which of the following factors that affect the size of a shadow of an object? I Type of object II Position of light source III Distance between object and the screen IV Distance between object and light source A I and IV C II and IV B II and III D III and IV

Time (minute)

0

3

6

9

12

Temperature of water (°C)

27

31

35

39

43

Table 3

Predict the temperature of the water at the 24th minute. A 55°C C 65°C B 59°C D 69°C 20 Diagram 10 shows beakers J and K are each filled with 250 ml of water.

14 K – Book M – Ball L – Glass plate N Transparency Which of the following objects that produce shadow? A K and L

C L and M 28

Diagram 11

Diagram 10

The condition of the electric cables as shown is during A morning. C evening. B afternoon. D night.

The temperature of water in both beakers J and K is 50°C. What is the new temperature when water from beakers J and K is poured into beaker L? A 100°C C 75°C B 80°C D 48°C

24 Diagram 12 shows the gaps between railway tracks.

21 Why do the ice cubes left in the open will melt after some times? A The ice cubes gain heat. B The ice cubes lose heat. C The temperature of the ice cubes decreases. D The temperature of the ice cubes is constant.

Diagram 12

What are the purposes of the gaps? I To allow the tracks to expand during hot weather. II To reduce the temperature of the tracks during hot weather. III To reduce the friction between the tracks and the wheels. IV To prevent the track from buckling during expansion. A I and II C II and III B I and IV D III and IV

22 Table 4 shows the temperature recorded from an investigation carried out by a group of pupils to measure the temperature of water. Time (minute)

3

6

9

12 15

18

Temperature (°C) 27

31

35 39 43 100

Table 4

25 The dented ping pong ball become round again. This is because A the air expand when heated. B the air contract when cooled. C the ping pong ball expand when heated. D the ping pong ball contract when heated.

Which of the following statements is correct? A The water becomes hot after 15 minutes. B The water starts to boil again after 15 minutes. C The temperature of water decreases with the increase of time. D The temperature of water remains the same once it starts boiling. 23 Diagram 11 shows electric cables hanging loosely from the poles.

Section B Answer all the questions. Write your answers in the spaces provided. 1 Diagram 1 shows an investigation carried out by a pupil to study the movement of light.

(ii) what is observed (responding variable): ____________________________________ [2 marks] (c) Predict what will happen if one of the cardboard in experiment A is replaced with a cardboard without a hole. _______________________________________ [1 mark]

Table 1 shows the observations of the investigation. Investigation

(d) Based on the observation, what can be concluded about the movement of light?

Observation

A

The light of candle can be seen

B

The light of candle cannot be seen

_______________________________________ [1 mark]

Table 1

2 Diagram 2 shows an investigation carried out by a pupil to test the ability of light to pass through various objects. The apparatus set-up is shown in Diagram 2. The experiment is repeated by replacing object X with object Y.

(a) What is the condition that enables the pupil in investigation A to see the candle flame? _______________________________________ [1 mark] (b) Based on the investigation, identify (i) what is changed (manipulated variable): ___________________________________ © PNI Neuron (M) Sdn. Bhd. (554690-H)

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(c) State the relationship between the temperature of the water and size of the balloon. _______________________________________ [1 mark] (d) What can be experiment?

Diagram 2

The result of the investigation are as follows: 1 When object X is used, no shadow is formed on the screen. 2 When object Y is used, a shadow is formed on the screen. (a) State one reason (inference) from the result gained by the pupil. _______________________________________ _______________________________________ [1 mark]

concluded

based

on

this

_______________________________________ [1 mark] 4 Diagram 4 shows an investigation carried out by a group of pupils to study the rates at which different materials gain heat.

(b) State the characteristics of object Y. _______________________________________ [1 mark] (c) Give one example which can be represented as object X.

Diagram 4

Three different types of rods are immersed in three beakers consisting same volume of water that is 300 cm3. The temperature of water in the three beakers is also the same. Table 2 shows the result of the investigation.

_______________________________________ [1 mark] A blurred shadow is formed on the screen When light is shone to object Z

(d) Predict what is the object Z. ______________________________________ [1 mark]

Beaker

P

Q

R

Temperature of water after 30 minutes (°C)

43

78

63

Table 2

(a) Based on the investigation, state (i) what is changed (manipulated variable): __________________________________

(e) What can be concluded from this investigation? ______________________________________ [1 mark]

(ii) what is observed (responding variable): __________________________________ [2 marks]

UNIT 7

(b) Why do you think that the temperature of water in the three beakers P, Q and R are different after

3 Diagram 3 shows the investigation carried out by a group of pupils using three bottles and balloons.

20 minutes? _______________________________________ [1 mark] (c) Which of the rod absorbs heat at the fastest rate? R

S

T

_______________________________________ [1 mark]

Diagram 3

(a) State the condition of balloon R. _______________________________________ [1 mark]

(d) Which of the rod is most suitable to make the handle of a cooking pot? _______________________________________ [1 mark]

(b) Give one reason (inference) for the observation of S and T.

(e) Explain your answer in (d).

_______________________________________ [1 mark]

_______________________________________ [1 mark]

30

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