Universe & Solar System Vocabulary

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Across
  1. 3. Explains why something happens.
  2. 5. A small piece of rock or metal traveling through space that is smaller than an asteroid.
  3. 8. The scientific idea that the universe began as a very small, hot, dense point and has been expanding ever since.
  4. 10. The tendency of an object to resist changes in its motion.
  5. 12. A large object that orbits a star and does not produce its own light.
  6. 13. The galaxy that contains our solar system.
  7. 15. A ball of ice, dust, and rock that orbits the Sun.
Down
  1. 1. A model that places the Sun at the center of the solar system.
  2. 2. A model that places Earth at the center of the universe.
  3. 4. The Sun and all the objects that orbit around it, including planets, moons, asteroids, and comets.
  4. 6. A rocky object that orbits the Sun, usually found in the asteroid belt between Mars and Jupiter.
  5. 7. The force that pulls objects toward each other.
  6. 9. A huge group of stars, gas, dust, and other objects held together by gravity.
  7. 11. Everything that exists, including all stars, planets, galaxies, matter, and energy.
  8. 14. Describes what happens.