What was Wegener's theory?

That all the continents used to be together in one land mass

Which if these is NOT evidence for Wegener's theory?

The land bridge between the continents

What causes earthquakes?

When the plates collide and friction is caused

Why don't scientists tell people when an earthquake is about to happen?

Because they are hard to predict

What is continental drift?

Where the tectonic plates slowly move

What causes continental drift?

The heat in the mantle causes convection currents

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C1.7 revision

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Questions 12

Answers

1
How did the percentage of oxygen in the atmosphere increase?
Plants doing respiration
Combustion
Decay of plants and animals
Plants doing photosynthesis
2
What was the earth's atmosphere like billions of years ago?
Lots of nitrogen
Lots of ammonia
Lots of carbon dioxide
Lots of oxygen
3
What was Wegener's theory?
That all the continents were far apart
That the mantle was still molten
That the continents moved
That all the continents used to be together in one land mass
4
Which if these is NOT evidence for Wegener's theory?
Similar soil types on different continents
The land bridge between the continents
Similar fossils on different continents
The way the shapes of the continents fit together
5
What are the two missing labels?
21% other gases, 78% oxygen
21% carbon dioxide, 78% oxygen
21% oxygen, 78% carbon dioxide
21% oxygen, 78% nitrogen
6
What causes earthquakes?
When the plates rub together
When the plates collide and friction is caused
When there is friction
When there is pressure
7
Why don't scientists tell people when an earthquake is about to happen?
Because they want to keep it a secret and not panic people
Because scientists don't have the technology
Because earthquakes are natural disasters
Because they are hard to predict
8
What is continental drift?
Where the tectonic plates quickly move
Where the crust stays still
Where the crust moves
Where the tectonic plates slowly move
9
Which label is missing?
Atmosphere
Mantle
Lithosphere
Convection current
10
In the carbon cycle which process does NOT release carbon dioxide?
Decay
Photosynthesis
Combustion
Respiration
11
Which of these is NOT a way that carbon dioxide is 'locked up'?
In carbonate rocks
In respiration
In fossil fuels
In the oceans
12
What causes continental drift?
The convection currents
The heat in the mantle
The heat in the core
The heat in the mantle causes convection currents

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