The Earth Flashcards
1
Q
What is the earths surface made up of?
A
Tectonic Plates
2
Q
The convection currents in the mantle cause what?
A
Continental Drift
3
Q
How much of the atmosphere is Nitrogen and Oxygen?
A
78% Nitrogen, 21% Oxygen
4
Q
What did the Earth’s early atmosphere consist of?
A
Most Carbon Dioxide with little oxygen
5
Q
How did the oceans form?
A
When the water vapour in the atmosphere was condensed
6
Q
What does the ozone layer do?
A
Block harmful rays from the sun
7
Q
What is ‘Locked up’ in sedimentary rocks?
A
Carbon and Hydrocarbon
