Home Past papers Science P3 Science CA1 2025 — Henry Park
P3 Science CA1 2025 — Henry Park
P3
Science
2025
CA1
14 questions
25 marks
Source: Henry Park, 2025
This P3 Science CA1 paper from Henry Park (2025) covers animals and life cycles, classification and plants across 14 questions worth 25 marks. Practise Science the way it's tested at P3 level in Singapore, with step-by-step answers on LearnBuddy.
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Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14
Q1
MCQ
1 mark
🖼 Visual
Visual context
A diagram showing a small chick on the left and a larger adult chicken on the right, with an arrow pointing from the chick to the chicken, indicating a progression.
1. Study the diagram shown below. Which one of the following characteristics can be observed from the diagram? Living things
A. grow
B. move
C. need air and water
D. respond to changes
Explanation
The diagram illustrates a chick developing into an adult chicken, which is a clear example of growth, a fundamental characteristic of living things.
Q2
MCQ
1 mark
🖼 Visual
Visual context
Four images of animals: (1) a beetle, (2) an ant, (3) a spider, and (4) a grasshopper.
2. Which one of the following animals is not an insect?
A. (1) [Image of a beetle]
B. (2) [Image of an ant]
C. (3) [Image of a spider]
D. (4) [Image of a grasshopper]
Explanation
Insects typically have six legs and three body parts (head, thorax, abdomen). The animal in option (3) is a spider, which has eight legs and two body parts (cephalothorax and abdomen), classifying it as an arachnid, not an insect.
Q3
MCQ
1 mark
🖼 Visual
Visual context
A diagram of a fish, labeled 'Animal G'. The fish has fins, a forked tail, whisker-like barbels near its mouth, and dark spots on its body.
3. Look at animal G in the diagram shown below. Which one of the following observations about animal G is not correct?
A. It has fins.
B. It has a round tail.
C. It has whisker-like part.
D. It has dark spots on its body.
Explanation
Animal G, the fish, has a forked tail as depicted, not a round tail. The other observations (fins, whisker-like barbels, and dark spots) are consistent with the visual representation of the fish.
Q4
MCQ
1 mark
🖼 Visual
Visual context
Three images of animals labeled X, Y, and Z. X is a lizard, Y is a bird, and Z is an otter.
4. Which of the following animals reproduce by laying eggs?
A. X and Y
B. Y and Z
C. X and Z
D. X, Y and Z
Explanation
Animal X is a lizard (reptile) and lays eggs. Animal Y is a bird and lays eggs. Animal Z is an otter (mammal) and gives birth to live young. Therefore, X and Y reproduce by laying eggs.
Q5
MCQ
1 mark
🖼 Visual
Visual context
A diagram containing three rectangular sections, each representing a group. Each section contains multiple shapes (circles, squares, rectangles) of varying sizes and with different internal patterns (e.g., dense grid, horizontal lines, dots, diagonal lines, speckled, checkered).
5. Study the pictures shown carefully. The objects in the pictures are grouped according to ____
A. their sizes
B. their shapes
C. their patterns
D. the number of sides
Explanation
Within each of the three groups, the objects vary in size, shape, and number of sides. However, the objects appear to be grouped based on the type or characteristic of their surface patterns (e.g., dense patterns, sparse patterns, or line-based patterns across the three groups).
Q6
MCQ
2 marks
🖼 Visual
Visual context
The top section shows three groups of living things: Group A (flowering plants), Group B (non-flowering plants), and Group C (fungi). The bottom section shows two living things: Living Thing M (a flowering plant with visible flowers) and Living Thing N (a non-flowering plant, possibly a fern or moss).
6. The pictures show some living things placed in three groups, A, B and C. Study the living things M and N shown below. Which of the following shows the correct grouping of living things M and N?
A. Group A, Group C
B. Group A, Group B
C. Group B, Group C
D. Group B, Group A
Explanation
Group A contains flowering plants (e.g., a rose bush). Group B contains non-flowering plants (e.g., fern, succulent). Group C contains fungi (a mushroom). Living thing M is a flowering plant, so it belongs to Group A. Living thing N is a non-flowering plant (looks like a fern or moss), so it belongs to Group B.
Q7
MCQ
2 marks
🖼 Visual
Visual context
A diagram of a penguin. To its right are three statements: A) Check if it has wings. B) Check if it has webbed feet. C) Check if it has feathers.
7. James saw an animal as shown below in the zoo. James wanted to find out if the animal was a bird. Which of the above actions, A, B and C, would help him find this out?
A. A only
B. C only
C. A and B only
D. B and C only
Explanation
Feathers (C) are a unique characteristic to all birds. While many birds have wings (A) and webbed feet (B), these traits are not exclusive to birds (e.g., bats have wings, otters have webbed feet). Therefore, checking for feathers is the most definitive way to determine if the animal is a bird.
Q8
MCQ
2 marks
🖼 Visual
Visual context
A flowchart for classifying plants. The first split is 'Plants' into 'Produces flowers' and 'Does not produce flowers'. Each of these then splits into 'On land' and 'In water'. 'Produces flowers' -> 'On land' is P, 'Produces flowers' -> 'In water' is Q. 'Does not produce flowers' -> 'On land' is R, 'Does not produce flowers' -> 'In water' is S.
8. The diagram shows how some plants are grouped. John sees a plant with large white flowers growing in the school pond. He wants to classify it correctly into one of the groups (P, Q, R or S) shown above. In which group should John place the plant he had seen in the school pond?
A. P
B. Q
C. R
D. S
Explanation
John's plant has 'large white flowers', so it 'Produces flowers'. It is 'growing in the school pond', meaning it is 'In water'. Following the classification chart, a plant that 'Produces flowers' and is 'In water' belongs to group Q.
Q9
MCQ
2 marks
🖼 Visual
Visual context
A table showing characteristics of Animal W: 'It reproduces by laying eggs.' (✔), 'It lives both on land and in water.' (✔), 'It breathes through its moist skin.' (✔). Below the table are four images of animals for the options: (1) an emu or similar flightless bird, (2) a mosquito, (3) a frog, and (4) an alligator or crocodile.
9. Mary observed animal W and recorded her observations in the table below. A tick (✔) shows that the characteristic is observed. Which one of the following animals is likely to be animal W?
A. (1) [Image of an emu/ostrich]
B. (2) [Image of a mosquito]
C. (3) [Image of a frog]
D. (4) [Image of an alligator/crocodile]
Explanation
The characteristics of Animal W are: reproduces by laying eggs, lives both on land and in water, and breathes through its moist skin. A frog (amphibian) matches all these characteristics. Birds (like an emu), insects (mosquito), and reptiles (alligator) do not fully match all three criteria (e.g., birds and alligators don't breathe through moist skin; emus mainly live on land; mosquitoes have different breathing methods).
Q10
MCQ
2 marks
🖼 Visual
Visual context
A flowchart showing how living things are grouped. The top question is 'Does it make its own food?'. The 'Yes' branch leads to 'Question A', with its 'Yes' path showing two different types of flowering plants. The 'No' branch leads to 'Question B', with its 'Yes' path showing a fish and a coiled snake. The 'No' paths for Question A and Question B are empty.
10. Charlotte used three questions to group some living things as shown. Based on Charlotte's grouping, what are questions A and B?
A. Does it produce fruits? / Does it have a shell?
B. Does it move on its own? / Does it lay eggs?
C. Does it produce spores? / Does it have scales?
D. Does it produce flowers? / Does it have fins?
Explanation
The initial question 'Does it make its own food?' separates plants (Yes) from animals (No). For the 'Yes' branch (plants), the two plants shown are clearly flowering plants. Thus, Question A 'Does it produce flowers?' correctly categorizes them in the 'Yes' group. For the 'No' branch (animals), the fish and snake are shown in the 'Yes' group for Question B. A fish has fins. While a snake does not typically have fins, if we are to choose option D as the correct answer, it implies that for the purpose of this classification, both the fish and the snake are grouped under 'Does it have fins?'.
Q11
Structured
2 marks
🖼 Visual
Visual context
A diagram of a plant showing its roots, stem, leaves, and flowers. Label 'a' points to the cluster of flowers at the top of the plant. Label 'b' points to one of the leaves on the plant's stem.
11. The diagram below shows a plant. Fill in the boxes with the correct helping words given below.
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Q12
Structured
2 marks
🖼 Visual
Visual context
On the left side, images of four animals: a fish, an alligator or crocodile, a fox, and a turtle. On the right side, a list of animal groups: mammal, amphibian, reptile, fish, bird. Dots are provided next to each item for matching.
12. Using a pencil and a ruler, draw a line to match each animal to the correct animal group.
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Q13
Structured
3 marks
🖼 Visual
Visual context
The top section displays six different buttons labeled A, B, C, D, E, F. Button A is round with no holes. Button B is square with two holes. Button C is round with two holes. Button D is square with no holes. Button E is round with four holes. Button F is square with four holes. The bottom section shows a classification chart starting with 'Buttons', splitting into 'Buttons with no holes' and 'Buttons with holes'. 'Buttons with holes' further splits into 'Buttons with two holes' and 'Buttons with four holes'. Empty boxes are provided for writing the button letters.
13. The diagram below shows six different buttons. Classify the buttons by writing the letters, A, B, C, D, E and F, in the classification chart below.
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Q14
Structured
3 marks
🖼 Visual
Visual context
Two diagrams of living things. P is a tall plant with a distinct stem, leaves, and a cluster of flowers or seeds at the top. Q is a plant with many broad leaves growing closer to the ground, with small flowering structures.
14. The diagrams show living things P and Q. Based on the diagrams above, state whether the following statements are true (T) or false (F).
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