Question 1

The classification diagram below shows how two different sets of things are grouped. Which one of the following can be placed in Group B?

Accepted Answer

B. ruler. Group A (fork, knife, cup) are eating utensils. Group B (pencil, eraser, pen) are stationery/writing items. A ruler is also stationery, so it belongs in Group B.

Question 2

Which of the following statement(s) about moss and the bird's nest fern is/are true? A They bear fruits. B They are non-flowering plants. C They cannot make their own food.

Accepted Answer

B. B only. Moss and bird's nest fern are non-flowering plants (B is true). They do not bear fruits (A is false). They contain chlorophyll and can make their own food through photosynthesis (C is false). Only B is correct.

Question 3

Study the diagrams below. Which of the following headings are suitable for Groups X and Y?

Accepted Answer

B. Group X: Water Plants / Group Y: Land plants. Group X shows plants growing in water (aquatic plants). Group Y shows plants growing on land (rose plant and another land plant). Therefore, suitable headings are 'Water Plants' and 'Land plants'.

Question 4

Jun Jie spotted an amphibian in his school garden. Which one of the following is the characteristic that he would be able to observe?

Accepted Answer

D. It has moist skin.. Amphibians (like frogs and toads) have moist skin to help with respiration. They do not fly, do not have scales, and do not have a beak.

Question 5

Ling Ling observes some characteristics of Animal X. • It lays eggs. • It has a beak. • It has feathers. • It lives on land. Which one of the following animals could most likely represent Animal X?

Accepted Answer

A. (chicken/hen). Animal X is a bird (lays eggs, has beak, has feathers). The lizard is a reptile (scales, no feathers). The frog/toad is an amphibian (moist skin, no feathers). Both the chicken and eagle are birds, but the chicken lives on land (does not fly long distances) which best matches the 'lives on land' clue, making it the most likely answer.

Question 6

Which one of the following characteristics describes both insects and reptiles?

Accepted Answer

C. They reproduce by laying eggs.. Both insects and reptiles reproduce by laying eggs. Not all insects have wings, and reptiles do not have wings. Insects have three body parts but reptiles do not. Their body coverings differ (insects have exoskeletons; reptiles have dry scaly skin).

Question 7

The diagram below shows how some animals have been grouped. Which of the following animals have been grouped wrongly?

Accepted Answer

B. goldfish and whale. Goldfish has wet scales (not a hard outer covering like insects/shells), so it is wrongly placed under 'hard outer covering'. Whale is a mammal with skin (and hair), not scales on dry skin, so it is wrongly placed under 'scales on dry skin'. Therefore goldfish and whale are grouped wrongly.

Question 8

Which one of the following sentences about fungi and bacteria is correct?

Accepted Answer

C. Both fungi and bacteria can cause food to go bad.. Both fungi and bacteria are decomposers that can cause food to spoil. Fungi cannot make their own food (no chlorophyll), so A is wrong. Both need water to survive, so B is wrong. Bacteria are too small to see with the naked eye, so D is wrong.

Question 9

Boon Teck recorded his observations of the three objects in the table below. Boon Teck dropped the objects one at a time into a tank of water. Which one of the following will Boon Teck observe when all the 3 objects are in the tank of water?

Accepted Answer

D. Ruler floats on water; Coin and eraser sink to bottom of tank.. The wooden ruler is less dense than water and floats. The metal coin is denser than water and sinks. The rubber eraser is also denser than water and sinks. So the ruler floats while the coin and eraser sink to the bottom.

Question 10

Study the properties of the 3 objects in the table below. A tick (✓) represents the property that the object has. Which of the following can the objects be?

Accepted Answer

A. Object A: writing paper / Object B: metal plate / Object C: plastic bag. Object A is flexible but not waterproof and not strong — writing paper fits (bends easily, absorbs water, tears easily). Object B is not flexible but waterproof and strong — a metal plate fits (rigid, water-resistant, strong). Object C is flexible, waterproof and strong — a plastic bag fits all three properties.

P3 Science CA1 2021 — Nanyang

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