C1 Atmosphere Flashcards Preview

GCSE AQA Chemistry Important > C1 Atmosphere > Flashcards

Flashcards in C1 Atmosphere Deck (19)
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1
Q

How much oxygen is in the present day atmosphere?

A

About 20%

2
Q

How much nitrogen is in the present day atmosphere?

A

About 78%

3
Q

How much argon is in the present day atmosphere?

A

About 1%

4
Q

Give the other gases present in the present day atmosphere.

A

Water vapour, carbon dioxide and noble gases

5
Q

What released gases into the atmosphere for the first billion years?

A

Volcanoes

6
Q

What was made from the condensation of water vapour?

A

Oceans

7
Q

What gases were probably in the early atmosphere?

A

Carbon dioxide, water vapour, methane and ammonia

8
Q

What gas was not probably present in the early atmosphere?

A

Oxygen

9
Q

The ‘primordial soup’ theory is one theory of how life was formed millions of years ago, what was needed in this theory?

A

Hydrocarbons, ammonia and lightning

10
Q

What produced the oxygen present in today’s atmosphere?

A

Plants

11
Q

How was the carbon dioxide from the early atmosphere locked up?

A

In sedimentary rocks as carbonates and fossils fuels

12
Q

Oceans act as a reservoir for carbon dioxide, what effect will increased carbon dioxide have?

A

Make the oceans more acidic and effect the marine environment

13
Q

How is carbon dioxide in the atmosphere increased?

A

Burning fossil fuels

14
Q

What absorbs carbon dioxide from the atmosphere?

A

Plants for photosynthesis

15
Q

How can the gases in air be separated?

A

Fractional distillation

16
Q

Why can gases in air be separated?

A

Different boiling points

17
Q

What is nitrogen used for?

A

Inert gas in packaging and making fertilisers

18
Q

What is oxygen used for?

A

Rockets fuel and medical use

19
Q

What is argon used for?

A

Light bulbs and arc welding