Primary School · General Studies

Air: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Air.

10 questions23 marksFree, no account

Question 1

1 mark

When we discuss the air pollution problem in cities like Hong Kong, which of the following is a common way to help reduce the amount of pollutants released into the air?

Question 2

1 mark

Which of the following is a preventive measure that a city government can take to reduce the air pollution problem caused by road traffic?

Question 3

1 mark

A student pushes an inverted glass cup vertically into a basin of water. A dry tissue is taped to the bottom of the cup. After pulling the cup out, the tissue is still dry. Why?

Question 4

1 mark

Which of the following components of air is not consumed during the process of burning but makes up the largest portion of the atmosphere?

Question 5

1 mark

If you compare two identical jars, Jar A filled with compressed air and Jar B filled with normal air, which statement is true regarding their weight?

Question 6

2 marks

When we perform an experiment to prove that air is necessary for burning, what will happen to a small candle if it is placed inside a sealed glass jar?

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Question 7

4 marks

Explain how air pollution affects people with respiratory conditions and suggest one way the government can help reduce pollutants from vehicles.

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Question 8

5 marks

In a science experiment, a candle is burned in a jar inverted over a basin of water. If the water level rises to occupy approximately \( \frac{1}{5} \) of the jar's volume after the flame goes out, what does this tell us about the composition of air?

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Question 9

3 marks

Air is an essential natural resource that possesses specific characteristics. Answer the following questions:
(a) Describe an experiment to prove that air has weight.
(b) Why does a balloon become larger and firmer when we blow air into it?

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Question 10

4 marks

In highly populated cities, the air pollution problem is a significant concern for public health.
(a) Identify two major sources of pollutants that contribute to poor air quality in urban areas.
(b) The government uses the Air Quality Health Index (AQHI) to inform the public. If the AQHI level is 'Very High', suggest one action the general public should take to reduce health risks.
(c) Explain one preventive measure that can be implemented at the community level to improve long-term air quality.

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