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Card 26

Front

Who is Alfred Wegener and what was his theory?

Back

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Card 27

Front

Why was Wegener's theory not accepted?

Back

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Card 28

Front

What evidence in 1950 suggested that Wegener was right?

Back

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Card 29

Front

What other evidence suggested Wegener was right?

Back

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Card 30

Front

What are the different layers of the earth?

Back

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Card 31

Front

What are the two types of crust?

Back

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Card 32

Front

What causes the tectonic plates to drift?

Back

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Card 33

Front

What can happen when a tectonic plate moves?

Back

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Card 34

Front

What are seismic waves and how are they measured?

Back

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Card 35

Front

What are the two different types of seismic waves?

Back

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