Question 1

Study the diagram below.

Jack saw a plant growing on a tree. He found spore bags on the underside of its leaves.

Based on the diagram, which of the following represents this plant?

Accepted Answer

C. G. Plants with spore bags (e.g. ferns) are non-flowering. A plant growing on a tree lives on land, not in water. Following the classification chart: Non-flowering plants → Land plants = G.

Question 2

The diagram below shows a water plant.

Study the diagram below.

Which of the following represents the water plant?

Accepted Answer

B. B. The water plant shown has roots and a fully submerged/floating body — it does not grow on land. Following the flowchart: 'Grows on land?' No → 'Floats on water?' Yes → B.

Question 3

The table below shows the characteristics of animals P and Q. A tick (✓) shows the presence of the characteristic.

Which of the following best represents animals P and Q?

Accepted Answer

B. P: reptile, Q: mammal. Animal P has dry scaly skin (reptile trait) — though reptiles do not typically 'live both on land and in water', the dry scaly skin clearly identifies P as a reptile. Animal Q has females that produce milk for young — this is the defining trait of mammals. So P = reptile, Q = mammal.

Question 4

The animals below are grouped according to one common characteristic.

Based on the diagram above, which animal does not belong to the group?

Accepted Answer

A. animal W. Animals X (penguin), Y (small bird/sparrow) and Z (duck) are all birds — they have feathers and lay eggs. Animal W is a bat, which is a mammal (has fur, females produce milk). Therefore W does not belong to the group of birds.

Question 5

Study the diagram below.

Which animal groups correctly represents A, B and C?

Accepted Answer

B. A: mammal, B: insect, C: fish. Follow the flowchart: 'Does it have hair?' Yes → 'Does it lay eggs?' No → A. Mammals have hair and do not lay eggs (most), so A = mammal. 'Does it have hair?' No → 'Does it have 6 legs?' Yes → B. Insects have 6 legs and no hair, so B = insect. No to both → C = fish (no hair, no 6 legs).

Question 6

Which statement about bacteria is not correct?

Accepted Answer

C. Bacteria feed only on dead living things.. Bacteria can feed on both living and dead things — many bacteria live inside living organisms (e.g. in our gut). Therefore the statement 'Bacteria feed only on dead living things' is incorrect. The other three statements are all true.

Question 7

The diagram below shows two living things.

How are X and Y similar?

A  Both reproduce by spores.
B  Both are non-flowering plants.
C  Both can make their own food.
D  Both need air, food and water to survive.

Accepted Answer

A. A and D only. X is a fungus (mushrooms) and Y is a fern (non-flowering plant). Both reproduce by spores (A is true). Both need air, food and water to survive (D is true). However, X (fungus) is not a plant, so B is false. X (fungus) cannot make its own food (no chlorophyll), so C is false. Correct combination: A and D only.

Question 8

The diagram below shows a boy using a swimming board.

Which material and its given property should be considered to make the swimming board?

Accepted Answer

C. Material C — It is able to float.. A swimming board must keep the user afloat in water. The most relevant property is the ability to float. Flexibility, absorbency and transparency are not needed for the board to function. Therefore Material C, which is able to float, is most suitable.

Question 9

Study the table below.

Which material, A, B, C or D, is most suitable to make part X of an umbrella?

Accepted Answer

D. D. Part X refers to the canopy (the fabric/sheet covering of the umbrella). The canopy must be waterproof (to keep rain out) and flexible (so the umbrella can fold). Being transparent is also acceptable. Material D is the only material that is transparent, waterproof and flexible — making it most suitable.

Question 10

Jacinta wanted to find out which bag, A or B, is more suitable for carrying canned food from the supermarket without tearing.

What should she do to find out which bag is more suitable?

Accepted Answer

D. Put canned food into both bags.. To test which bag can carry canned food without tearing, Jacinta must actually load each bag with canned food and observe which one tears (or holds the load). Putting them in water tests waterproofness, bending them tests flexibility, and shining light tests transparency — none of these test strength under load.

P3 Science CA1 2021 — Catholic High

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