Earth And Its Atmosphere

Question 1

When do scientists think the earth was formed?

Answer 1

4500 million year ago

Question 2

What gases were given out from volcanoes when the earth war first formed?

Answer 2

1) carbon dioxide
2) water vapour
3) Ammonia
4) methane

Question 3

What did the water vapour help to do?

Answer 3

Form oceans as it condensed

Question 4

What happened lightly 3500 million year ago?

Answer 4

First signs of life was formed

Question 5

What was good about the first signs of life?

Answer 5

Sea creatures could carry out the process of photosynthesis and remove the CO2 from the production from the volcanoes and photosynthesis caused increase in oxygen

Question 6

What was the CO2 converted into in the ocean?

Answer 6

Converted into carbonate and that ended up in the shells in sea creatures which formed into sedimentary rock