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Slide 2

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State the two ways in which carbon
dioxide was removed from the early
atmosphere.…read more

Slide 3

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Give the names of the gases in the
current atmosphere and their
percentages.…read more

Slide 4

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Name the five pollutants that can be
found in the air.
Hint: Three of them have to do with carbon.…read more

Slide 5

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Name a pollutant that is directly
harmful to humans.
Hint: Think about which gas affects the human body directly and which could kills us.…read more

Slide 6

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What is it called when no atoms or
mass is lost during a chemical
reaction?
Hint: The word `mass' is in the phrase.…read more

Slide 7

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