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Chemistry - Core > The Earths Sea And Atmosphere > Flashcards

Flashcards in The Earths Sea And Atmosphere Deck (10)
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1
Q

What is in today’s at atmosphere and how much?

A

Nitrogen - 78%
Oxygen - 21%
Argon - 1%
Carbon dioxide - 0.04%

2
Q

Originally, what was the earths surface

A

Molten which caused the atmosphere to boil away

3
Q

How were oceans formed

A

Volcanoes gave out water vapour and carbon dioxide which cooled

4
Q

How did green plants evolve and produce oxygen

A

Grew over the earth and took in carbon dioxide and gave out oxygen in photosynthesis

5
Q

What happened to the first marine organisms

A

Took in carbon dioxide and got buried under sediments of rocks and formed carbonate rocks

6
Q

What created the ozone layer (O3)

A

Oxygen

7
Q

What did the ozone layer do

A

Blocked harmful rays from the sun and allowed organisms to grow

8
Q

How is human activity changing the atmosphere

A

Burning fossil fuels release carbon dioxide
Deforestation releases carbon dioxide
Livestock farming release methane

9
Q

How is volcanic activity changing the atmosphere

A

Sulfur dioxide forms volcanic smog

Carbon dioxide released

10
Q

How can you study the change in atmosphere

A

Bubbles of air get trapped in Antarctic ice cores each year and can be seen