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Which gas has the highest concentration in dry air?
Nitrogen
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Which gas varies in concentration with weather changes?
Water vapour
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What is the source of most of the pollutants in the air?
Burning fuels
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The atmosphere of the early Earth was largely made up of:
Carbon dioxide and water vapour
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Which of these is improved by taking several measurements rather than one?
Reliability
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What can the mean be used as?
Mean can be used as best estimate.
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What is the total number of atoms in a molecule of sulfur dioxide, SO2?
3
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How many oxygen atoms are present in a molecule of water H2O?
1
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What pollutant gas is always formed when coal is burned completely?
Carbon dioxide.
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What other gas is formed when petrol is burned completely?
Water vapour
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What acidic gas is formed when fuels containing sulfur compounds are burned?
Sulfur dioxide
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What is produced when sulfur dioxide reacts with water and oxygen?
Acid rain
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What pollutant coats the walls of buildings?
Particulates
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What pollutant is removed by the process of photosynthesis?
Carbon dioxide.
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When the number of cars using a road increases, the concentration of nitrogen dioxide in the air increases. What word can be used to describe this link?
Correlation.
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What is needed to make a correlation valid?
A large amount of data
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Which product of burning fossil fuels may lead to global warming?
Carbon dioxide
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How can the amount of sulfur dioxide released from power stations be reduced?
Removing sulfur from natural gas
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Biofuel is a good alternative to fossil fuels because it:
Is a renewable energy source.
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Other cards in this set

Card 2

Front

Which gas varies in concentration with weather changes?

Back

Water vapour

Card 3

Front

What is the source of most of the pollutants in the air?

Back

Preview of the front of card 3

Card 4

Front

The atmosphere of the early Earth was largely made up of:

Back

Preview of the front of card 4

Card 5

Front

Which of these is improved by taking several measurements rather than one?

Back

Preview of the front of card 5
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