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| the air above the Earth. It acts like a shield protecting us from harmful sun rays. [image] |
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| [image] the planet humans live on. It is the third (3rd) planet from the sun. |
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| the force on Earth that keeps us on the ground. [image] |
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| a big ball of dirt and rock that revolves (turns) around the Earth. [image] |
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| to turn around a center. [image] |
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| the area past the Earth's atmosphere. [image] |
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| the sun and the group of objects(planets, moons) that revolves around it. [image] |
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| the star at the center of our solar system. [image] |
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| an instrument used to look at the stars and planets.[image] |
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| everything that exists in space including Earth and its atmosphere. [image] |
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| a large objects that turns (revolves) around the sun or another star.[image] |
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| a large group of stars with gas and dust, held together by gravity.[image] |
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