2018 P4 SA2 Examination Suggested Answer Set

Errata Sheet

2018 P4 SA2 Examination Paper – Methodist Girls’ School (Q35b)

The iron cube sinks in water while the styrofoam cube floats on water. Thus, the iron cube occupies more space than the styrofoam cube in the water and displaces more water, causing the water level in beaker A to be higher.

2018 P4 SA2 Examination Paper – Methodist Girls’ School (Q38c)

The shadow formed is fainter. Less light from the light source, which travels in a straight line, is blocked by the frosted plastic sheet, which is translucent.

2018 P4 SA2 Examination Paper – Methodist Girls’ School (Q39b)

The air spaces in material Q are poor conductors of heat. Therefore, the oven glove made of material Q conducts heat from the hot objects to the hands slowly, preventing the hands from getting burnt easily.

2018 P4 SA2 Examination Paper – Methodist Girls’ School (Q40b)

Explain data: This shows that Material H allows the most light to pass through. Thus, most light from the light source would be able to be reflected off his surroundings and pass through the lens to enter the user’s eyes, allowing him to see his surroundings the most clearly.