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CPO ESS Chapter 17

Earth Space Science Chapter 17 Terms

TermDefinition
Asteroid an object that orbits the Sun but is too small to be considered a planet.
Astronomical Unit equal to 150 million km
Axis the imaginary line that passes through the center of a planet from pole to pole.
Comet an object in space made mostly of ice and dust.
Gas planets made mostly of hydrogen and helium; include Jupiter
Gravitational force the force of attraction between all objects.
Law of universal gravitation states that the strength of the gravitational force depends on the mass of the objects and the distance between them.
Meteor a chunk of burning rock traveling through Earth's atmosphere.
Meteorite a chunk of burning rock that passes through Earth's atmosphere and strikes the surface.
Orbit regular repeating path that an object in space follows around another object.
Planet a massive object orbiting a star like the Sun.
Satellite an object in orbit around another object.
Solar system the Sun and all objects that are bound by gravitational force to the Sun.
Terrestrial planets made mostly from rock and metal.
Created by: tjmelia
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