Earths sea and atmosphere

Question 1

what gases did volcanoes give out when volcanoes erupted?

Answer 1

carbon dioxide and water vapour

Question 2

what happened to the CO2?

Answer 2

Dissolved

Question 3

what did the build up of oxygen mean?

Answer 3

killed organisms

Question 4

what did the oxygen create?

Answer 4

ozone layer

Question 5

Name 3 types of human activity that changes the composition of the atmosphere

Answer 5

1. Burning fossil fuels
2. Deforestation
3. Livestock farming

Question 6

How is volcanic activity changing the atmosphere?

Answer 6

1. Sulfur dioxide released into atmosphere when volcanoes erupt
2. C02 also released

Question 7

Why cant we be sure about the evidence of the atmospheres evolution?

Answer 7

Nobody there to take measurements