Section A: MCQ ( 6 X 2 marks ) Question Answer
1 2 3 4 5 6
3 4 2 2 1 3
Lee Puay Joo Christine TG04
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Section B ( 12 marks)
Questions Acceptable Marks Partially Responses Correct Answers 7(a)
7(b)
7(c)
Concept: Recognize that the Sun is the main source of heat and light energy. main/primary
1 mark
Concept: 1 mark Recall that objects can be seen when they reflect light. Reflect/reflects/ reflected
Concept: 1 mark Recognize the type of material that only allows some light to pass through. translucent
Lee Puay Joo Christine TG04
Misspelled word that sounds like the actual word but does not form another word of meaning. e.g. primary/primiry Misspelled word that sounds like the actual word but does not form another word of meaning. e.g. refect/reflect/ refleck Misspelled word that sounds like the actual word but does not form another word of meaning. e.g. transulent/ transluscent/ translocent
Marks Unacceptable Responses
½ mark Misspelled word that sounds like the actual word and forms another word of meaning. e.g. man/mane/mint important/vital/ only ½ mark Misspelled word that sounds like the actual word and forms another word of meaning. e.g. refrect/refract Bounce off/shine/ give off ½ mark Misspelled word that sounds like the actual word and forms another word of meaning. transparent/opaque/ white/clear/not so clear
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Questions Acceptable Marks Partially Responses Correct Answers 8 (a) (b)
Skills: Relate the change in temperature to heat loss. Infer that different materials conduct heat at different rates. Container Q 1 mark Container Q is 1 mark made of a material that is a poor conductor of heat( ½ m), and so is able to retain heat better ( ½ m).
-‐-‐-‐-‐-‐
Container Q is made of a material that is a bad conductor of heat (0 m), and so is able to retain heat better. Container Q was able to retain heat the most.
Marks Unacceptable Responses
-‐-‐-‐-‐-‐ Container P/R/S ½ mark No marks awarded if explanation is correct but answer in (a) is wrong. The water in Container Q was still hot after 10 minutes. The water in Container Q was the hottest. The water in Container Q lost heat the slowest.
Lee Puay Joo Christine TG04
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Questions 9(a)
9(b)
Acceptable Responses
Marks
Skills: To distinguish and classify groups of animals. A: Fish B: Mammals
Concept: State the characteristics of insects.
1 mark
1 mark i) Have 6 legs Any 2 ii) Have 3 body characteristics; parts/segments/head, ½ mark each.
Partially Marks Unacceptable Correct Responses Answers Misspelled ½ mark word that sounds like the actual word but does not form another word of meaning. e.g. mamals, mammils
Misspelled word that sounds like the actual word and forms another word of meaning. e.gmanimals Any specific examples that are fish/mammals. e.g.: A: guppy/goldfish B: cow/horse/lion
Any characteristic not common to only insects. e.g. have wings/ can fly/ live on land
body and abdomen iii) Have feelers/ antennae iv) Lay eggs
Lee Puay Joo Christine TG04
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Question 3 Distracters (1) There is no transfer of heat between the hot tea and ice.
(3) The ice has lost its coldness to the hot tea and so melts faster.
(4)The hot tea has lost heat to the ice and so there is an increase in the temperature of the tea.
Justification Pupils may be unable to recall the concept of heat transfer or understand that there is heat transfer when two objects of different temperature are in contact, and thus may not be able to apply to the given situation. As the flow of heat is rather abstract in real-‐ life situations, pupils may not be able to visibly see it. Thus, this might lead them to infer that there is no heat flow involved in the given situation. A common misconception amongst pupils pertains to objects having lost their ‘coldness’ when they become hotter. Pupils may also ‘zoom in’ on the words ‘melts faster’ as such occurrences are familiar to them in real-‐life experiences. Pupils may ‘zoom in’ and agree with the first part of the statement ‘the hot tea has lost heat’. However, they may be unable to associate heat loss with the corresponding change in temperature.
Lee Puay Joo Christine TG04
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Question 6 Distracters (1) The shadow will disappear
(2) The shadow will become smaller
(4) There will be no change in the size of the shadow
Justification Pupils may predict and infer wrongly that the screen is now too far away for the shadow to be casted as the shadow may not be able to ‘reach’ it, thus the shadow disappears. Pupils may predict that since the screen is further, the shadow formed must be smaller. They may draw references from their knowledge of vision, wherein objects tend to appear smaller when they are further away. Also, pupils may confuse the effects of the changes in position of the screen with the effects of the changes in position of the light source on the shadow. As the light source is further away from the object, the shadow formed will be smaller. Hence, pupils may apply the same concept to the change in position of the screen and its effect on the size of the shadow, and be inclined to think that similarly, the shadow will become smaller, since like the torch, the screen is further away from the object. Pupils may not be able to relate the change in the position of the screen to the change in size of the shadow. This may be attributed to common real-‐life situations where the screen is usually fixed.
Lee Puay Joo Christine TG04
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