2017 P6 Preliminary Examination Science Suggested Answer Set

Errata Sheet

2017 P6 Preliminary Examination Paper – Anglo-Chinese School (Combined) (Q30a)

Similarity: Both the young of Organisms P and Q have an egg stage.

2017 P6 Preliminary Examination Paper – Anglo-Chinese School (Combined) (Q35b)

2017 P6 Preliminary Examination Paper – Methodist Girls’ School (Q32b)

Foot P. Unlike the other feet, the webbed feet have a larger exposed surface area in contact with the mud, preventing animal F from sinking into the mud easily.

2017 P6 Preliminary Examination Paper – Nanyang Primary School (Q35b)

Chemical Potential Energy

2017 P6 Preliminary Examination Paper – Raffles Girls’ Primary School (Q35b)

Any two of the following:

2017 P6 Preliminary Examination Paper – Raffles Girls’ Primary School (Q38c)

No. Although Blocks P and W had different area of contact……….

2017 P6 Preliminary Examination Paper – Rosyth School (Q36a)

Most heat from the house was lost through the walls. Thus, the poor conductors of heat would reduce the rate of heat loss from the house to the cooler surrounding air, keeping the houses warm in cold conditions.

2017 P6 Preliminary Examination Paper – Rosyth School (Q36c)

The thick fur helps the koala trap more air, which reduces the amount of heat gain by the koala from the warmer surrounding air, helping the koala to stay cool. The thin fur traps less air and allow the koala to lose heat faster from the body to the cooler tree trunk, helping the koala to stay cool.

2017 P6 Preliminary Examination Paper – Rosyth School (Q40a)

When the box was pulled up the ramp, the kinetic energy of the box is converted to heat energy due to friction between the surface of the box and the ramp.

2017 P6 Preliminary Examination Paper – Red Swastika School (Q36a)

Plate A is made of a material that is a better conductor of heat. Thus, the warmer water vapour (H) lost heat faster to the cooler surface of Plate A (P) and condensed (C) to form more tiny water droplets, causing more liquid to be collected in Container X.

2017 P6 Preliminary Examination Paper – Red Swastika School (Q40b)

Chemical potential energy (batteries) -> Electrical energy (circuit) -> Heat energy (nichrome wire)

2017 P6 Preliminary Examination Paper – Singapore Chinese Girls’ School (Q34b)

Remove the first answer (Since H is a herbivore … obtain food to feed on easily.)

Only accepted answer is: Organism H is able to blend in/camouflage with the tree branch, preventing predators from spotting it easily.

2017 P6 Preliminary Examination Paper – Singapore Hokkien Huay Kuan (Q30a(i))

Benefit of Plant C:

When Animal D goes to the flower of Plant C to obtain nectar, the pollen grains on its body would be transferred to the stigma, allowing pollination to take place. Thus, fertilisation would occur and the flower would develop into a fruit.

2017 P6 Preliminary Examination Paper – Singapore Hokkien Huay Kuan (Q36d)

The magnets had lost some of their magnetism. The magnetic force of attraction between the two magnets became weaker than the gravitational force acting on the magnets, preventing them from staying on the window.