Flocabulary: Solar System: Confessions of a Planet – Flashcards
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In its orbit, Earth circles the sun once every year. This movements around the sun is called a
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revolution
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Rocks and pebble that hit Earth's atmosphere and burn up are
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meteors
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Newton's Law of Inertia states that
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an object stays in motion unless acted upon by another force
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The spinning of Earth on its axis is an example of its
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rotation
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Kepler's Laws of Motion explain why
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planets closer to the sun travel faster in their orbits than planets that are far away from the sun
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Earth rotates on an imaginary line that runs from the North Pole to the South Pole. This line is called Earth's
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axis
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The distance from Earth to the sun is 150 million kilometers (93 million miles). We call this distance
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one astronomical unit
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An object that orbits a planet is called
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a satellite
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The inner planets are
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Mercury, Venus, Earth and Mars
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Tides on Earth are controlled by
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the gravity of the moon
