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GCSE Chemistry > Chapter 13 - The Earth's atmosphere > Flashcards

Chapter 13 - The Earth's atmosphere Flashcards

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1
Q

Explain a theory relating to the formation of The Earth’s early atmosphere.

A
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2
Q

During the period where there was intense volcanic activity on Earth, what two planets may its atmosphere have been like?

A

Venus and Mars atmospheres.

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3
Q

State how and why Oxygen in the atmosphere increased.

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4
Q

How many years ago did algae first produce oxygen?

A

2.7 Billion years ago.

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5
Q

How did Carbon Dioxide in the atmosphere decrease, state 2 ways.

A
  • Algae and plants used it for Photosynthesis.
  • Carbon dioxide decreased due to the formation of sedimentary rock and fossil fuels that contain carbon.
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6
Q

Explain how carbonate rocks, such as limestone are formed.

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7
Q

Which compound is limestone predominantly made up of?

A

Calcium Carbonate.

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8
Q

What is coal classified as?

A

A sedimentary rock.

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9
Q

What plants is coal formed from?

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10
Q

Explain how coal is formed.

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11
Q

What is crude oil formed from?

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12
Q

Explain how crude oil is formed.

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13
Q

Explain how natural gas is formed.

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14
Q

State why natural gases, such as The Hydrocarbon Methane is found near deposits of oil.

A
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15
Q

Susie states that all fossil fuels contain trapped carbon. Do you agree, if so explain why?

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16
Q

State why methane and ammonia gas may have decreased from the atmosphere.

A
17
Q

State why Nitrogen gas levels in the atmosphere built up/increased.

A
18
Q

For how many years has the proportions of The Earth’s atmosphere been stable/roughly the same as they are today?

A

200 Million years.

19
Q

State the fraction and percentage of Nitrogen in The Earth’s atmosphere.

A
20
Q

State the fraction and percentage of Oxygen in The Earth’s atmosphere.

A
21
Q

Describe the proportion of the various other gases in The Earth’s atmosphere.

A
22
Q

State the gases in the Earth’s atmosphere, and their formulae.

A
23
Q

All Noble gases are present in the Earth atmosphere apart from..?

A

Helium, (He) and Radon, (Rn)

24
Q

State the similarities between the Earth’s atmosphere then and now.

A
25
Q

State the differences between the Earth’s atmosphere then and now.

A

GCSE Chemistry (13 decks)

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