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12 Cards in this Set
- Front
- Back
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craters
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round holes in the ground made by something that has fallen or exploded on them.
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sphere
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solid round shape like a ball.
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billions
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at least twice more than the number 1,000.000.000
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planets
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large objects in space like Earth that move around a star such as the sun.
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rotates
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goes around like a wheel.
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continents
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one of the large areas of land on Earth, such as Africa, Europe, and Australia.
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surface
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top or outside.
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temperature
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measure of how hot or cold something is.
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astronaut
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someone who travels and works in space.
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constellation
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group of stars that look like a picture.
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orbit
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travel in a circle in space around a larger object.
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asteroids
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small rocky objects that move around the sun.
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