The Earth's atmosphere Flashcards

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1
Q

What was the Earth’s early atmosphere formed by?

A

volcanic activity

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2
Q

What did the Earth’s early atmosphere consist of?

A
mainly carbon dioxide
Also small amounts of:
-nitrogen
-water vapour
-ammonia
-methane
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3
Q

What is the atmosphere?

A

The relatively thin layer of gases that surround Earth.

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4
Q

What is a carbon footprint?

A

The total amount of carbon dioxide and other greenhouse gases emitted over the full life cycle of a product, service or event.

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5
Q

What did photosynthesis do to the atmosphere?

A
  • Decreased the amount of carbon dioxide.

- Produced more oxygen, making the Earth’s atmosphere richer in oxygen, meaning animals could now survive.

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6
Q

What are the (3) main greenhouse gases?

A
  • carbon dioxide
  • methane
  • water vapour
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