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lesson 6

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
What is the moon like ?   dry, airless, has an irregular surface, small compared to earth, has large variations in its surface temperature  
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Maria   dark, flat areas that are hardened rock formed from huge lava flows that occurred 3-4 billion yrs ago  
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Craters   large pits that can be hundreds of kilometers across, caused by meteoroids  
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Highlands   mountians that are light-colored on the moon's surface, cover most of the moon's surface  
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Moons Diameter   3,476 kilometers across, 1/4 of Earth's diameter  
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Moons Mass   1/8 of Earth's mass  
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Moons Gravity   1/6 of Earth's gravity  
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Moons Temperature   ranges from 130c to -170c , they very because the moon has no atmosphere  
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Collision-ring Theory   the theory of how the noon was formed  
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Average Density   the moon and earth are very similar  
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