chapter 21 crossword puzzle

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Across
  1. 5. what gives us light?
  2. 6. what makes Venus hotter than Mercury?
  3. 7. what has a long glowing tail and is made of gas, dust and ice?
  4. 8. what are planets that are not in the solar system?
  5. 10. what are the planets that are farthest away from the sun?
Down
  1. 1. where are all the planets in space?
  2. 2. what is in the solar system?
  3. 3. what do we use to measure distance in space?
  4. 4. what are the planets that are closer to the sun?
  5. 9. what are rocks that are in space?