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Related Flashcards
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Cards In This Set
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How long does Earth's rotation take?
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24 hours
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How long does one complete revolution around the sun take?
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One year
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Whey does Earth have seasons?
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Its axis is tilted as it revolves around the sun.
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What are tides caused by?
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Differences in how much the moon pulls on different parts of the earth.
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What caused maria on the moon?
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Ancient lava flows
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How large is the moon compared to earth?
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One fourth the diameter of the Earth.
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How do scientists think the moon was formed?
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A large object struck Earth, and ejected material from the collision combined
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When does an equinox occur?
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Neither end of Earth's axis is tilted toward or away from the sun.
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Why do you never see the far side of the moon?
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Because the moon rotates once for each revolution around the earth.
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The amount of the lighted side of the moon you can see is the same during?
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The first and third quarter phases
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Why are you less likely to see a total solar ecliupse than a total lunar eclipse?
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The moon's umbra only covers a small area on Earth's surface.
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What are two factors that keep Earth and moon in orbit?
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Gravity and inertia
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The strength of the force of gravity depends on what?
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The masses of the objects and the distance between them.
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The temperature of the moon's surface varies from day to night because?
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It has no atmosphere.
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During a total lunar eclipse the moon is in Earth's what?
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Umbra
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