C1: Our Changing Atmosphere

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Which of these are sources of minerals and other resources used by humans? i. The Earth's crust ii. The Earth's core iii. The atmosphere iv. The oceans
i, iii and iv
1 of 10
What is the solid outer layer of the Earth called?
Crust
2 of 10
What causes the tectonic plates to move across the surface of the Earth?
Convection currents
3 of 10
How can you separate the mixture of gases found in the air?
Fractional distillation
4 of 10
The Earth is made of layers that formed many millions of years ago. What is the thickness of the Earth's crust?
Between 5 km under the oceans to 70 km under the continents.
5 of 10
How is carbon dioxide added to and removed from the atmosphere?
It is removed by dissolving in the oceans and forming sedimentary rocks. It is added by burning fossil fuels and when the ocean is warmed up.
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What are the percentage compositions of gases in the atmosphere today?
Oxygen: 21% Nitrogen: 78% Noble Gases: 0.96% Carbon Dioxide: 0.04%
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What is the process that started billions of years ago and helped to change the carbon dioxide in the atmosphere into oxygen gas?
Photosynthesis
8 of 10
The early atmosphere around the Earth contained ammonia gas. As plants evolved, the oxygen they produced helped to change the ammonia gas into another gas found in the atmosphere today. Which gas is this?
Nitrogen
9 of 10
The early atmosphere around the Earth contained methane gas. As plants evolved, the oxygen they produced helped to change this methane gas into two other gases found in the atmosphere today. Which two gases are they?
Carbon dioxide and water vapour.
10 of 10

Other cards in this set

Card 2

Front

What is the solid outer layer of the Earth called?

Back

Crust

Card 3

Front

What causes the tectonic plates to move across the surface of the Earth?

Back

Preview of the front of card 3

Card 4

Front

How can you separate the mixture of gases found in the air?

Back

Preview of the front of card 4

Card 5

Front

The Earth is made of layers that formed many millions of years ago. What is the thickness of the Earth's crust?

Back

Preview of the front of card 5
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