Evolution of atmosphere phase 1

Question 1

How long ago was the earth formed

Answer 1

4.6bn

Question 2

What were the first billion years of Earth’s history like

Answer 2

Pretty explosive - the surface was covered in volcanoes that erupted and released lots of gases we think early atmosphere formed

Question 3

Early atmosphere was probably mostly

Answer 3

mostly C02 , with virtually no oxygen

Question 4

Volcanic activity released

Answer 4

volcanoes release nitrogen which built up atmosphere over time , as well as water vapour and small amounts of methane and ammonia