Earth, Moon, and Mercury

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Flashcards covering the Earth, Moon, and Mercury.

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9 Terms

1
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Earth has a , , and _.

Metal core, silicate mantle, and outer crust

2
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Our planet's geology is dominated by _, in which crustal plates move slowly in response to mantle convection.

Plate tectonics

3
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The atmosphere is composed primarily of and _.

N2 and O2

4
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_ and _ in the atmosphere heat the surface through the greenhouse effect.

CO2 and methane

5
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Earth has been influenced by the _, including such recent examples as Meteor Crater and the Tunguska explosion.

Impacts of cosmic debris

6
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Recent spacecraft have found evidence of a ___ , most likely deposited by comet and asteroid impacts.

Small amount of water near the lunar poles

7
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The Moon, like Earth, was formed about ___.

4.5 billion years ago

8
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The ___ says that the Moon originated from the impact of a Mars-sized projectile with Earth 4.5 billion years ago.

Giant impact hypothesis

9
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Mercury differs from the Moon in having a very large ___.

Metal core