Label the diagram of the earth Why is an increase in the levels of atmospheric carbon dioxide harmful for marine life?
Explain the differences in the amount of carbon dioxide in the early atmosphere compared to today.
Why do earthquakes and volcanic eruptions happen?
What parts of the Earth do we get our minerals from?
What is a tectonic plate?
Explain why the plates move
What evidence is there that the plates are moving?
Label the pie chart with the names
How did the Earth’s early oceans form?
and percentages of gases to show the composition of the Earth’s atmosphere today.
How can the gases in the air be separated?
Why is there so little carbon dioxide in today’s atmosphere?.
.
Why was Wegener;s theory initially rejected?
What did the Miller-
Urey experiment show?
Give 2 pieces of evidence that support Wegener;s theory.
What was responsible for the composition of
Earth’s early atmosphere?

Label the diagram of the earth
Crust Mantle
Why is an increase in the levels of atmospheric carbon dioxide harmful for marine life?
Carbon dioxide dissolves in the oceans, making them more acidic.
Explain the differences in the amount of carbon dioxide in the early atmosphere compared to today.
Plants photosynthesised
Used up carbon dioxide
Produced oxygen
Core
Atmosphere
What parts of the Earth do we get our minerals from?
The crust, the atmosphere and the oceans
How can the gases in the air be separated?
By points.
Why was Wegener;s theory initially rejected?
No evidence at time
Theory of land bridge more popular
Present day animals not similar on different continents fractional distillation as they have different boiling
What is a tectonic plate?
Section of the crust
Explain why the plates move
Radioactive decay in the core
Releases heat that is transferred to the mantle
And causes convection currents
What evidence is there that the plates are moving?
Sea floor is spreading
How did the Earth’s early oceans form?
As the earth cooled, the water vapour in the atmosphere condensed
Why is there so little carbon dioxide in today’s atmosphere?.
Most of it is dissolved in the oceans or trapped in sedimentary rocks as carbonates or fossil fuels. What did the Miller-
Urey experiment show?
That amino acids could be formed from the interaction hydrocarbons of and ammonia with lightning.
What was responsible for the composition of
Earth’s early atmosphere?
Volcanic eruptions
Why do earthquakes and volcanic eruptions happen?
Sudden movements at plate boundaries
Label the pie chart with the names and percentages of gases to show the composition of the Earth’s atmosphere today.
Oxygenn –
20% Trace gases
(argon, water vapour) –
1%
Nitrogen –
80%
Carbon dioxide –
0.003%
Give 2 pieces of evidence that support Wegener;s theory.
Land masses on different continents have coastlines that fit together
Similar fossils found on different continents