P4 Science CA2 2023 — Red Swastika

John touched a snail as shown in the diagram below. The snail pulled its head into its shell. What could John conclude about living things from his observation?

The following table shows the characteristics of three living things, A, B and C. Characteristics — A: Can make its own food = Yes, Has scales = No, Lives in water only = No, Has spores = Yes; B: Can make its own food = No, Has scales = Yes, Lives in water only = Yes, Has spores = No; C: Can make its own food = No, Has scales = No, Lives in water only = No, Has spores = Yes. Which of the following groups do A, B and C belong to respectively?

Which of the following are functions of the skeletal system in a human body? A: Give the body shape. B: Support the human body. C: Protect the organs in the body. D: Transport blood around the body.

During recess, Jane ate 100 g of food. The diagram below shows the amount of undigested food when it exits organs, A, B, and C, of the digestive system. Which parts of the digestive system do A, B and C represent?

Which of the following functions are correctly matched to the plant parts?

Andrea prepared two experiments as shown below. She filled 2 identical beakers, M and N, with the same amount of water and put 2 similar plants in them. She then removed the roots of the plant in Beaker M. The layer of oil prevents water from escaping into the surrounding air. She recorded the amount of water in each beaker at the end of 5 days. Which one of the following best represents the volume of water in beakers, M and N at the end of 5 days?

The diagram below shows a hammer hitting a nail. Metal is used to make the hammer head because metal is ____.

Strips of material A and material B were hung on a hook as shown below. Two identical boxes were then hung onto the strips. Carrie observed the outcome of the experiment as shown below. Which one of the following conclusion could be made from the above experiment?

A bar magnet was suspended freely from a retort stand as shown below. The bar magnet would come to rest in the ____ direction.

Jessica had four different magnets, A, B, C and D. She placed a steel paper clip at Position M. She moved each magnet towards the paper clip until it attracted the paper clip and measured the distance, P, between the paper clip and the magnet. She recorded her results in the table shown below. Magnet A: Distance P = 5 cm; B: 3 cm; C: 8 cm; D: 6 cm. Based on the results above, arrange the magnets in order of their magnetic strength from the strongest to the weakest.

The following objects are classified based on whether they are sources of heat. Sources of heat: hairdryer, frying pan, burning candle. Not sources of heat: iron, jacket, blanket. Which of the following objects are classified wrongly?

John stuck four identical drops of wax, A, B, C and D, to an iron rod. He then heated the iron rod as shown in the diagram below. Which one of the following shows John's observation?

Look at the picture below. Which one of the following shows the path of light which enables Tania to see the book on the table?

An experiment was conducted to find out the amount of light that can pass through different materials of the same size and thickness at the same time. They were placed at positions, A, B and C, in a dark room as shown below. The greater the amount of light detected by the light sensor, the greater the reading on the data logger. Which one of the following correctly shows which materials are at positions A, B and C, and the reading on the datalogger as shown above?

Study the flowchart below. (a) Based on the information in the above flowchart only, state one similarity between P and Q. (1m) (b) Based on the information in the above flowchart only, state one difference between P and S. (1m) (c) Based on the flowchart in the previous page, which letter, P, Q, R or S, best represents the following animals? (2m) — Tilapia: ____; Parrot: ____.

Four similar ice cubes are placed in four sealed containers, W, X, Y and Z. The containers are made of different materials of equal thickness and identical size. The graph below shows the time taken for the ice in each container to melt completely. (a) Based on the information above, which material, W, X, Y and Z, would most likely be metal? Explain your answer. (2m) (b) Kenny is going for a picnic at the park and would be bringing ice cream. Based on the information given above, which material, W, X, Y or Z, should he use if he wants to make sure that the ice cream is still cold when he arrives at the park? Explain your answer. (2m)

Adriel was at the park at night. He was able to see the moon, a dustbin, a street lamp and a tree. (a) Based on the diagram above, identify the source of light. (1m) (b) Explain how Adriel was able to see the tree at night. (1m) (c) Adriel conducted an experiment to find out the amount of light that can pass through materials, A, B and C. The greater the amount of light detected by the light sensor, the greater the reading on the data logger. He recorded his findings in the table below. Materials — A: 370 units; B: 0 units; C: 100 units. (i) Put a tick (✓) to show the changed variable in the experiment above. (1m) — Variables: Types of material / Types of light source / Thickness of material. (ii) Adriel wanted to set up an aquarium for his fish. He wanted a material that allows him to see the fish clearly. Based on the Adriel's finding, which of the following materials, A, B or C, is the most suitable material for the tank? Give a reason for your answer. (1m)