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17 Cards in this Set
- Front
- Back
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System
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When a combination of things interact or work together like the sun, moon and earth
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Axis
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an imaginary line that passes through the North Pole, South Pole, and center of the Earth
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Rotation
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spins on its axis, the Earth rotates once every 24 hours or once a day
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Revolves
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travels around another object, the Earth revolves around the sun, it takes 365 days or one year to travel around the sun
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Lunar phases
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the changes in the way the moon looks
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Tides
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the rise and fall of the water of the ocean caused by the pull of gravity between Earth, the moon, and the Sun
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Solar System
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a star (sun) and everything within reach of the star's gravity, our solar system includes the sun, planets and other objects including moons, comets, asteroid, and meteoroids
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Asteroids
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belt of rocks between Mars and Jupiter
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Comets
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ball of ice and dust thatorbit the sun
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Meteoroids
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pieces of comets, asteroids, and dust moving in space if it enters the Earth's atmosphere and begins to burn up it is called an meteor, when it hits the Earth's surface it is called a meteorite
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Orbit
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the path of a planet around the sun
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Astronomer
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a scientist who studies bodies in outer space
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Hydrosphere
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all the water on the surface of the Earth and underground
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Atmosphere
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a mixture of gases surrounding a planet or moon held in place by gravity
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Lithosphere
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the rocky surface of the Earth
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Galaxy
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a group of stars
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Constellation
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a group of stars that form a picture in the sky
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