2019 P5 SA1 Examination Suggested Answer Set

Errata Sheet

2019 P5 SA1 Examination Paper – Raffles Girls’ Primary School (Q35c)

Correction: DO NOT mention variables that have already been stated in the experiment.

2019 P5 SA1 Examination Paper – Raffles Girls’ Primary School (Q30a)

As temperature increases, the average length of the life cycle of the Aedes mosquito decreases. OR The higher the temperature, the shorter the average length of the life cycle of the Aedes mosquito.

2019 P5 SA1 Examination Paper – Methodist Girls’ Primary School (Q38ci)

Correction: Using similar beakers ensures that the amount of exposed surface area of the liquid in contact with the surrounding air would be kept the same and would not affect the rate of evaporation of the liquids. This ensures that there is only one changed variable, which is the temperature in the box, that will affect the results of the experiment.

2019 P5 SA1 Examination Paper – Methodist Girls’ Primary School (Q38cii)

Correction: Using the same amount of liquids ensures that the amount of heat in the liquids are the same and would not affect the rate of evaporation of the liquids. This ensures that there is only one changed variable, which is the temperature in the box, that will affect the results of the experiment.

2019 P5 SA1 Examination Paper – Methodist Girls’ School (Q41b)

Substance X is water vapour water droplets.

2019 P5 SA1 Examination Paper – Nanyang Primary School (Q38b)

Alternative accepted answer:
Choose: (Given)
Use Data: Kettle Y was placed on the steel plate with the biggest gaps.
Explain data: Thus, the steel plate that kettle Y was placed on has the most air between the gaps. Since air is a poor conductor of heat, this causes the warmer water in kettle Y to lose heat to the cooler surrounding air the slowest and take the longest time to cool down to 40 ºC.