Home Past papers Science P3 Science CA1 2025 — Methodist Girls
P3 Science CA1 2025 — Methodist Girls
P3
Science
2025
CA1
9 questions
20 marks
Source: Methodist Girls, 2025
This P3 Science CA1 paper from Methodist Girls (2025) contains 9 questions worth 20 marks. Use it as a study reference for Science topics typically tested at P3 level in Singapore schools.
Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9
Q1
MCQ
2 marks
🖼 Visual
Visual context
A classification chart titled 'Things'. It branches into two categories: 'Living' and 'Non-living'. Under 'Living' are listed: ant, tree, cloud. Under 'Non-living' are listed: rock, paper, bench.
Study the classification chart below.
Which one of the things above has been grouped incorrectly?
(1) ant
(2) rock
(3) cloud
(4) paper
1) ant
2) rock
3) cloud
4) paper
Explanation
The classification chart categorises 'Things' into 'Living' and 'Non-living'. An ant is a living thing, a tree is a living thing. A rock, paper, and bench are non-living things. However, 'cloud' is listed under 'Living' things. Clouds are non-living things (they do not grow, reproduce, respond to stimuli, or need food/water/air). Therefore, 'cloud' is grouped incorrectly.
Q2
MCQ
2 marks
🖼 Visual
Visual context
A table showing Jane's age, height, and weight over 8 years. Columns are 'Age', 'Height (cm)', 'Weight (kg)'. Rows are: '2 years' (80 cm, 9.6 kg), '4 years' (94 cm, 12.9 kg), '6 years' (107 cm, 16 kg), '8 years' (118 cm, 19.4 kg).
Jane's parents recorded her height and weight over 8 years as shown in the table below.
Based on the information in the table, what can be concluded?
A Jane can grow.
B Jane can reproduce.
C Jane needs air, food and water.
D Jane can respond to changes around her.
(1) A only
(2) A and C only
(3) B and C only
(4) B and D only.
1) A only
2) A and C only
3) B and C only
4) B and D only.
Explanation
The table shows that Jane's height and weight increased from 2 years old to 8 years old. This directly demonstrates that Jane can grow. Statements B, C, and D are general characteristics of living things, but the provided table only contains data about Jane's physical dimensions over time, which only supports the conclusion about growth. Therefore, only statement A can be concluded from the given information.
Q3
MCQ
2 marks
🖼 Visual
Visual context
A flow chart for classifying animals. It starts with a question: 'Does It have feathers?'. If 'Yes', it leads to 'W'. If 'No', it leads to another question: 'Does it have scales?'. If 'Yes' to 'Does it have scales?', it leads to 'X'. If 'No' to 'Does it have scales?', it leads to 'Y'.
Study the chart below.
Which of the following is not correct?
(1) Y could be a fish.
(2) W could be a bird.
(3) X could be a reptile.
(4) Y could be an insect.
1) Y could be a fish.
2) W could be a bird.
3) X could be a reptile.
4) Y could be an insect.
Explanation
Following the flow chart:
- W represents animals that have feathers (e.g., birds). So, (2) W could be a bird is correct.
- X represents animals that do not have feathers but have scales (e.g., reptiles, fish). So, (3) X could be a reptile is correct.
- Y represents animals that do not have feathers and do not have scales (e.g., mammals, amphibians, insects). So, (4) Y could be an insect is correct.
- A fish has scales, so it would fall into category X, not Y. Therefore, (1) Y could be a fish is not correct.
Q4
MCQ
2 marks
🖼 Visual
Visual context
A box containing bullet-point observations about Animal Q: 'It has four legs.', 'It can live on both land and in water.', 'It has moist skin.'
Sarah found an unknown animal Q near a pond. She made some observations about animal Q as shown below.
Which animal group does Q belong to?
(1) Insect
(2) Reptile
(3) Mammal
(4) Amphibian
1) Insect
2) Reptile
3) Mammal
4) Amphibian
Explanation
The observations state that Animal Q has four legs, can live on both land and in water, and has moist skin. These characteristics are typical of amphibians (e.g., frogs, salamanders). Insects have six legs, reptiles have dry scaly skin, and mammals typically have fur or hair, none of which fit all descriptions for Animal Q.
Q5
MCQ
2 marks
🖼 Visual
Visual context
A table showing two groups of plants, Group A and Group B, with images. Group A contains images of a coconut tree and a papaya tree. Group B contains images of a bird's nest fern and moss.
The table below shows how some plants are grouped.
What are two possible headings for Groups A and B?
Group A
Group B
(1) Grow from spores
Grow from seeds
(2) Non-flowering
Flowering
(3) Grow on land
Grow in water
(4) Can produce fruits
Cannot produce fruits
Group A Group B
(1) Grow from spores Grow from seeds
Group A Group B
(2) Non-flowering Flowering
Group A Group B
(3) Grow on land Grow in water
Group A Group B
(4) Can produce fruits Cannot produce fruits
Explanation
Group A includes coconut and papaya, which are flowering plants that produce fruits. Group B includes bird's nest fern and moss, which are non-flowering plants that do not produce fruits.
- Option (1) is incorrect as Group A grows from seeds and Group B grows from spores.
- Option (2) is incorrect as Group A is flowering and Group B is non-flowering.
- Option (3) is not the best distinction as both groups predominantly grow on land.
- Option (4) 'Can produce fruits' for Group A (coconut, papaya) and 'Cannot produce fruits' for Group B (fern, moss) is accurate and reflects the key difference between flowering and non-flowering plants shown.
Q6
MCQ
2 marks
🖼 Visual
Visual context
A classification chart of 'Animals' branching into 'J' and 'K'. Under 'J' are: cat, horse, whale. Under 'K' are: eagle, parrot, penguin, ant, mosquito, dragonfly, turtle, lizard, crocodile. Below the chart is a table comparing characteristics for J and K. The table has columns 'J' and 'K' and rows 'A', 'B', 'C', 'D' describing potential headings: A (J: Lives on land, K: Lives on land and in water), B (J: Has a constant body temperature, K: Does not have a constant body temperature), C (J: Has an outer covering of hair, K: Has an outer covering of feathers), D (J: Reproduces by giving birth to young alive, K: Reproduces by laying eggs).
Study the classification chart on animals below.
Which of the following can headings J and K be?
A Lives on land
B Has a constant body temperature
C Has an outer covering of hair
D Reproduces by giving birth to young alive
(1) D only
(2) A and B only
(3) C and D only
(4) A, B, C and D
J K
A Lives on land Lives on land and in water
B Has a constant body temperature Does not have a constant body temperature
C Has an outer covering of hair Has an outer covering of feathers
D Reproduces by giving birth to young alive Reproduces by laying eggs
1) D only
2) A and B only
3) C and D only
4) A, B, C and D
Explanation
Group J consists of mammals (cat, horse, whale). Group K consists of birds (eagle, parrot, penguin), insects (ant, mosquito, dragonfly), and reptiles (turtle, lizard, crocodile).
Let's evaluate the options:
- A: 'J: Lives on land' is incorrect because whales live in water. 'K: Lives on land and in water' is too broad and not specific.
- B: 'J: Has a constant body temperature' is true for mammals. 'K: Does not have a constant body temperature' is incorrect because birds in Group K (eagle, parrot, penguin) have a constant body temperature.
- C: 'J: Has an outer covering of hair' is true for mammals. 'K: Has an outer covering of feathers' is only true for birds in Group K, not insects (exoskeleton) or reptiles (scales).
- D: 'J: Reproduces by giving birth to young alive' is true for all mammals in Group J. 'K: Reproduces by laying eggs' is true for birds, insects, and reptiles in Group K. This characteristic consistently distinguishes the two groups.
Q7
Structured
2 marks
🖼 Visual
Visual context
A two-column table for matching. The left column, 'Descriptions', contains four items with images: 1. 'Ali noticed that a millipede curled up when he touched it with a leaf.' (image shows a millipede before and after curling up). 2. 'A turtle laying eggs.' (image shows a turtle laying eggs). 3. 'A chick becomes a chicken.' (image shows a chick growing into a chicken). 4. 'A plant grows towards light.' (image shows a plant in a pot, then bending towards a light source). The right column, 'Characteristics of living things', contains three items with dots to connect to: 'Living things can grow.', 'Living things respond to changes.', 'Living things reproduce.'
Match the descriptions to the correct characteristics of living things by drawing lines to connect the dots.
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Q8
Structured
3 marks
🖼 Visual
Visual context
A black and white drawing of Animal Z, which is a bee or wasp, clearly showing three body parts (head, thorax, abdomen), two antennae, and six legs.
(a) Which animal group does animal Z belong to?
(b) State two reasons for your answer in (a).
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Q9
Structured
3 marks
🖼 Visual
Visual context
Two animal images: Animal W is a bat. Animal X is a guppy (a small fish). For part (c), there is an image of a dolphin.
(a) Which animal group does animal W belong to?
(b) How do animals W and X reproduce?
(c) The picture below shows a dolphin. It can swim and lives in water.
Can the dolphin be classified in the same animal group as animal X? Explain why.
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