Science Crossword

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Across
  1. 1. The gases that surrounds the Earth or other planets.
  2. 3. A big planet that is made of mostly helium and/or hydrogen
  3. 4. A ring made of asteroids that separates the inner and outer planets
  4. 5. What something is made up of/its ingredients
  5. 8. Force that attracts any two things that have mass
  6. 9. The place in which the eight planets are contained and revolve around the sun.
  7. 10. Everything that exists or has existed
Down
  1. 2. The ability to keep something at a certain level
  2. 6. The outside layer of matter
  3. 7. a planet that has an icy surface