1194803
Descrição
Quiz por ildasolha.jamari, atualizado more than 1 year ago
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Criado por ildasolha.jamari
mais de 9 anos atrás
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Questão 1
Questão
When we breathe in air, our body utilises the following gases:
Responda
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Nitrogen, oxygen and carbon dioxide.
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Nitrogen and oxygen only.
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Oxygen only.
Questão 2
Questão
Plants only give out oxygen to the environment. It does not take in oxygen.
Responda
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True
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False
Questão 3
Questão
What is the percentage of oxygen in the air?
Responda
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1%
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21%
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78%
Questão 4
Questão
Why is it an advantage to have water vapour present in the air?
Responda
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The water vapour makes the air moist and not too dry for us to breathe in.
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The water vapour breathed in will enter the digestive system to prevent thirst.
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The water vapour will be used for respiration in the body to produce energy.
Questão 5
Questão
Which statement is true?
Responda
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Oxygen is the only useful gas in the air for living things.
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Nitrogen is the most abundant gas in the air but is useless to living things.
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Carbon dioxide exists in a small percentage in the air but is useful for living things.
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