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12 Cards in this Set

  • Front
  • Back

any one of thousands of small planets or rocks that circle around the sun

asteroid

when a substance combines with another to form a new substance

chemical change

a bright heavenly body that develops a cloudy tail as it moves closer to the sun in its orbit

comet

one of the very large groups of stars and other matter that are found throughout the universe

galaxy

the galaxy of which the solar system is a part and which contains the stars that create the light

Milky Way Galaxy

a natural satellite that revolves around a planet

moon

the path taken by one body circling around another body, as in the path of the earth around the sun

orbit

a large body in space that orbits a sun but does not produce light

planet

the sun with the planets, moons, asteroids, and comets that orbit it

solar system

the closest star to Earth

sun

adjustment to environmental conditions

adaptation

a theory that the various kinds of plants and animals are descended from other kinds that lived in earlier times and that the differences are due to inherited changes that took place over many generations

evolution