Earth And The Atmosphere

Question 1

How was early atmosphere made?

Answer 1

Early atmosphere was made from volcanoes (mostly carbon dioxide and water with no oxygen)

Question 2

What formed the oceans?

Answer 2

• The Earth cooled. Water vapour condensed to form the oceans
• Carbon dioxide dissolved in the oceans

Question 3

What happened to plants?

Answer 3

Plants photosynthesised - removing carbon dioxide and making oxygen

Question 4

Greenhouse gasses

Answer 4

Greenhouse gasses include carbon dioxide, water vapour and methane. They absorb heat radiated from the Earth and stop it going in to space

Question 5

How are greenhouse gasses increased?

Answer 5

Greenhouse gasses are increased by burning fossil fuels and livestock farming

Question 6

How is climate change caused?

Answer 6

Climate change may be caused by humans - as increased CO2 and increased temperatures correlate but not a proven link

Question 7

We can reduce climate change by?

Answer 7

We can help reduce climate change by reducing the fuels burnt on our behalf