More cards in this set

The volcanoes gave out a lot of ...?

What do we think the gas formed?

What was the early atmosphere mainly made of?

What other things might have been in the atmosphere?

When did the oceans form?

After a while, a lot of the ........ .......... dissolved into the oceans?

The green plants and algae also absorbed some of the ....... ...... and produced ...... by photosynthesis?

When plants and algae died, what were they buried under?

What happened to the carbon and hydrocarbons inside the plants and algae?

When we burn fossil fuels today, what happens?