P3 Science CA1 2023 — Pei Chun

Q: Raja found an animal in a pond. He observed how the animal changed over a few days. From his observation, Raja can conclude that the animal is a living thing because it can ____.

A. grow. The diagram shows a tadpole changing into a frog over a few days. This change in size and form is growth, which is a characteristic of living things.

Q: The diagram below shows a plant. Which part, (1), (2), (3) or (4), is the roots?

D. (4). The roots are the branching underground parts of the plant. Label (4) points to the branching structures below the soil. Label (1) is the flower, (2) is the stem, and (3) is a leaf.

Q: The table below gives some information on plant X, based on two characteristics. A tick (✓) shows that the plant has the characteristic. From the information given, where does plant X belong in the following classification diagram?

B. B. Plant X produces flowers (tick) so it is a flowering plant. It does not have a tick for 'Grows on land', meaning it does not grow on land, so it must grow in water. Flowering + grows in water = group B.

Q: The table below shows how some animals can be grouped. The diagram below shows a mammal. In which group of animals does this mammal belong?

A. K. The mammal shown is a bat. A bat has wings (for flying) and, as a mammal, has hair on its body. 'Has wings' + 'Has hair' corresponds to group K.

Q: Four students made the following observations about an animal. Anna: 'It lays eggs.' Bala: 'It has scales.' Carl: 'It can swim in water.' Dawn: 'It has four legs.' Based on their observations, this animal can be classified as a/an ____.

C. reptile. The animal lays eggs, has scales, can swim and has four legs. Fish have no legs, insects have six legs, and amphibians have moist skin (no scales). Only reptiles match all four observations — they lay eggs, have scales, can swim, and many have four legs (e.g. crocodiles, turtles).

P3 Science 2023 CA1 9 questions 20 marks

Source: Pei Chun, 2023

This P3 Science CA1 paper from Pei Chun (2023) contains 9 questions worth 20 marks. Use it as a study reference for Science topics typically tested at P3 level in Singapore schools.

Q1 MCQ 2 marks 🖼 Visual

Raja found an animal in a pond. He observed how the animal changed over a few days. From his observation, Raja can conclude that the animal is a living thing because it can ____.

Q2 MCQ 2 marks 🖼 Visual

The diagram below shows a plant. Which part, (1), (2), (3) or (4), is the roots?

Q3 MCQ 2 marks 🖼 Visual

The table below gives some information on plant X, based on two characteristics. A tick (✓) shows that the plant has the characteristic. From the information given, where does plant X belong in the following classification diagram?

Q4 MCQ 2 marks 🖼 Visual

The table below shows how some animals can be grouped. The diagram below shows a mammal. In which group of animals does this mammal belong?

Q5 MCQ 2 marks 🖼 Visual

Four students made the following observations about an animal. Anna: 'It lays eggs.' Bala: 'It has scales.' Carl: 'It can swim in water.' Dawn: 'It has four legs.' Based on their observations, this animal can be classified as a/an ____.

Q6 Structured 3 marks 🖼 Visual

Aini saw a housefly resting on the table. (a) Aini moved her hand near the housefly and the housefly flew away. What characteristic of living things did the housefly show? [1] (b) Aini kept the same number of houseflies in two glass containers as shown below. Explain why the houseflies in container X could stay alive longer than those in container Y. [1] (c) Aini added some pieces of banana into container X. Explain how this would help the houseflies to stay alive. [1]

Q7 Structured 2 marks 🖼 Visual

Joanne grouped some living things as shown in the table below. Group K contains rabbit's foot fern and water moss fern. Group L contains dandelion and hibiscus. Choose the correct phrases from the box below to give suitable headings for K and L. [2] Box of phrases: Grow on land / Grow in water / Can produce fruits / Can make its own food / Cannot produce fruits / Cannot make its own food. K: ____ L: ____

Q8 Structured 3 marks 🖼 Visual

Study the chart below. Letters P, Q, R and S represent four different animals. Use the information in the chart to answer the following questions. (a) State a similarity between animals P and Q. [1] (b) Which of these animals, P, Q, R or S, is/are insects? [1] (c) The diagram below shows an animal. Match the animal to the correct letter (P, Q, R or S) in the chart. [1] It is animal ____.

Q9 Structured 2 marks 🖼 Visual

Jim observed animal Z and concluded that it is a bird. (a) Tick (✓) one of the following characteristics of animal Z that allowed Jim to conclude that it is a bird. [1] Options: It can fly. / It has wings. / It has feathers. (b) State how animal Z reproduces. [1]

P3 Science CA1 2023 — Pei Chun

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