Early Oceans Flashcards
(5 cards)
1
Q
What happened to the carbon dioxide after oceans had formed?
A
Carbon dioxide dissolved into the oceans causing the percentage in the atmosphere to drop.
2
Q
What did sea plants use the carbon dioxide for?
A
Photosynthesis- take in carbon dioxide and excrete oxygen.
3
Q
Sea animals used carbon dioxide for what?
A
To make shells. Once the sea creatures died the shells and fossils built up to form carbonate rocks
4
Q
Water is also known as H-2O
What happens when water vapour condenses?
A
Intermolecular forces hold the molecules together
H-2O can come in liquid, solid or gas form.
5
Q
What happened when the earth cooled?
A
Water vapour condensed and fell as rain to from oceans
