The Earths Sea And Atmosphere

Question 1

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

Answer 1

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

Question 2

Originally, what was the earths surface

Answer 2

Molten which caused the atmosphere to boil away

Question 3

How were oceans formed

Answer 3

Volcanoes gave out water vapour and carbon dioxide which cooled

Question 4

How did green plants evolve and produce oxygen

Answer 4

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

Question 5

What happened to the first marine organisms

Answer 5

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

Question 6

What created the ozone layer (O3)

Answer 6

Oxygen

Question 7

What did the ozone layer do

Answer 7

Blocked harmful rays from the sun and allowed organisms to grow

Question 8

How is human activity changing the atmosphere

Answer 8

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

Question 9

How is volcanic activity changing the atmosphere

Answer 9

Sulfur dioxide forms volcanic smog

Carbon dioxide released

Question 10

How can you study the change in atmosphere

Answer 10

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