ildasolha.jamari
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Quiz on Air, created by ildasolha.jamari on 26/08/2014.

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ildasolha.jamari
Created by ildasolha.jamari over 9 years ago
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Air

Air

Question 1 of 5

1

When we breathe in air, our body utilises the following gases:

Select one of the following:

  • Nitrogen, oxygen and carbon dioxide.

  • Nitrogen and oxygen only.

  • Oxygen only.

Explanation

Question 2 of 5

1

Plants only give out oxygen to the environment. It does not take in oxygen.

Select one of the following:

  • True

  • False

Explanation

Question 3 of 5

1

What is the percentage of oxygen in the air?

Select one of the following:

  • 1%

  • 21%

  • 78%

Explanation

Question 4 of 5

1

Why is it an advantage to have water vapour present in the air?

Select one of the following:

  • The water vapour makes the air moist and not too dry for us to breathe in.

  • The water vapour breathed in will enter the digestive system to prevent thirst.

  • The water vapour will be used for respiration in the body to produce energy.

Explanation

Question 5 of 5

1

Which statement is true?

Select one of the following:

  • Oxygen is the only useful gas in the air for living things.

  • Nitrogen is the most abundant gas in the air but is useless to living things.

  • Carbon dioxide exists in a small percentage in the air but is useful for living things.

Explanation

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