Unit 1 Crossword Puzzle

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Across
  1. 1. inner planets made mostly of solid rock
  2. 6. spinning on its axis
  3. 8. relationship a predictable and repeatable event
  4. 11. gas layer surrounding Earth
  5. 12. tide tide occurs during a new or full moon; when high and low tides have their greatest difference
  6. 15. process by which the sun creates energy
  7. 16. water changing from gas to liquid
  8. 18. point in Earths orbit when it is closest to the sun
Down
  1. 2. referring to when an object orbits around another object
  2. 3. measure of how circular or oval an objects orbit is
  3. 4. relationship when one variable increases, the other variable increases
  4. 5. outer planets that are made mostly of gas
  5. 7. volcanic eruptions that released gasses creating Earth's early atmosphere
  6. 9. point in Earths orbit when it is furthest away from the sun
  7. 10. the liquid layer of Earth
  8. 13. the oval shaped path that planets and other objects take around the sun
  9. 14. water changing from liquid to gas
  10. 17. cloud of gas or dust in outer space