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The Universe and Planet Earth
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__________ orbit the Sun and are made of ice, rock and dust.
Comets
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____________ are large rocks that orbit the Sun.
Asteroids
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How many planets are there?
8
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What occurs when the Earth is between the Sun and the Moon?
a lunar eclipse
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What occurs when the Moon is between the Earth and the Sun?
a solar eclipse
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What is the name of our galaxy?
The Milky Way
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_____________ are small pieces that break off asteroids or comets and sometimes enter the Earth's atmosphere.
Meteoroids
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The Earth spins on its __________.
Axis
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What is the most accepted theory for how the Universe began?
The Big Bang Theory
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What is the space rock that hits the Earth's ground called?
Meteorite
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How long is one revolution?
365 days
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How many time zones are around the world?
24
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There are huge, powerful telescopes in special buildings called_________.
observatories
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The Earth revolves around the __________.
Sun
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What revolves around the Earth?
The Moon
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What are the imaginary lines that divide the world into different time zones?
meridians
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What is Earth's satellite?
The Moon
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