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11 Cards in this Set
- Front
- Back
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How long does it take the moon to revolve around Earth? (revolution period, days) |
27 days |
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How long is the moon cycle? (new moon to new moon) |
29 days |
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What causes a change in tides? |
Mostly the moon, barely the sun |
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What causes a change in seasons? |
The Earth's tilt of 23.5 degrees |
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What causes a solar eclipse? |
When the moon is in the right position, it temporarily blocks the suns rays. |
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How was the universe formed? (scientific theory) |
15 billion years ago, there was a big bang. The Big Bang theory. |
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How were planets formed? |
Accretion theory: Small dust and gas particles clump together over time |
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How was the sun formed? |
A supernova from far away in the galaxy struck a nebula |
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How was the moon formed? |
Giant Impact Hypothesis: A 5th planet struck Earth, fragments underwent accretion. |
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What causes a lunar eclipse? |
When the moon falls into Earths shadow and it has an orange/red appearance. |
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What causes the different phases of the moon? |
Where the moon is positioned around the Earth determines the shape of the light it reflects from the sun. |
