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19 Cards in this Set
- Front
- Back
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Neap tides
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very high low tides, very low high tides
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sptring tide
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very high high tides and very low low tides
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why is the sun's gravity greater than the moons?
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bc the sun is larger
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flood tide
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change from low to high
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ebb tide
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change from high to low
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slacktide
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doesnt change
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does the moon revolve and rotate at the same or different rate?
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same
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when does a lunar eclipse occur?
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when the sun, earth, and moon are in the same plane
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what causes a lunar eclipse?
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the moon is behind the earth and the sun casts earths shadow on the moon
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during what phase of the moon does a solar eclipse occur?
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new moon phase
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why does the moon have impact craters?
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it lacks an atmosphere--meteorites do not burn up
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how long does it take the moon to completely cirlce the Earth?
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27.32 days (about 30 days)
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how many degrees latitude does the moon cover per day?
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13
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why is the moon visible?
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light from the sun reflects its surface
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how many days does it take to go through the complete cycle of phases?
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29.5 days
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umbra
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a region of shadow in which all of the light has been blocked
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penumbra
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only part of the light is blocked, so the light is dimmed but not totally absent
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time difference between high and low tide
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6 hrs
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time difference between high tide and next high tide
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12 hrs
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