Benchmark Review Crossword Puzzle

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Across
  1. 3. Planet closest to the Sun
  2. 6. Variable that you change in a science experiment
  3. 8. Heat Transfer that occurs through touch
  4. 9. Imaginary line around the center of the Earth
  5. 11. Invention that proved the Sun is the center of the Solar System
  6. 13. Heat Transfer that comes from the sun
  7. 14. Smallest part of an element
  8. 15. Variable that you measure in a science experiment
Down
  1. 1. Two elements combine to form this
  2. 2. Variables that stays the same in a science experiment
  3. 4. Heat Transfer that is the rising and falling of air
  4. 5. Causes the moon to revolve around the Earth
  5. 7. Only planet in our solar system to have liquid water
  6. 10. Demoted to Dwarf Planet status in 2006
  7. 12. Made of ice and dust and travels in elliptical orbits