Question 1

Describe one form of tectonic disruption on Mercury,Venus,and Mars,respectively,and how they formed.

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Question 2

Describe the difference between seismic primary and secondary waves and why this difference makes them useful in probing the structure of the Earth's interior.

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Question 3

How do we know that Earth's magnetic field has flipped its polarity many times in the past?

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Question 4

The American and African/European continents are now separated by the Atlantic Ocean,which is approximately 4,000 km wide.Assuming a continental drift rate of 2 cm/year,how long has it been since they were one landmass?

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Question 5

Describe two reasons why Earth's magnetic field cannot be a result of permanent magnetism.

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Question 6

How does the radioactive heating of Earth vary from when it was first formed 4.6 billion years ago until today?

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Question 7

Which planet would you expect to have a larger molten core,a planet of Earth's size or a planet that had half the radius of Earth? Explain why.

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Question 8

If you obtained a sample of Martian rock,determined the abundances of  and  in it,and found that for every 1 uranium atom there were 7 lead atoms,then what would the age of this rock be? Note that  decays to  with a half-life of 700 million years.Assume that there was no  in the rock when it originally formed.

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Question 9

Which is denser,the mantle of Earth or its crust? Explain why.

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Question 10

Suppose you had samples of the same kind of rock from two planets that were completely identical except that the interior of one was chemically differentiated and the interior of the other was not.How would you expect the samples to differ from each other?

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Question 11

How are the volcanoes on Venus and Mars different from the volcanoes on the Earth? What might explain this difference?

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Quiz 7: The Terrestrial Planets and Earths Moon