6th Grade Science

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Across
  1. 2. one of the most abundant elements
  2. 5. one of the most abundant elements
  3. 6. hottest planet
  4. 8. the force that pulls things toward the earth
  5. 11. only planet with water in all 3 states of matter
  6. 13. has the most moons
  7. 15. coldest planet
  8. 16. this variable never changes
  9. 18. this variable is what you change
  10. 20. a cloud of dust
  11. 22. the purest substance on earth
  12. 23. largest planet
  13. 26. Mercury, Venus, Earth, Mars
  14. 28. this contains EVERYTHING
  15. 29. Pluto isn't a planet because it doesn't ___ its orbit
Down
  1. 1. this variable is what you measure, it is the outcome
  2. 3. particle outside the nucleus that has a negative charge
  3. 4. smallest planet
  4. 7. The nebula started to heat up, contract, and ____.
  5. 9. Neptune's twin
  6. 10. Jupiter, Saturn, Uranus, Neptune
  7. 12. particle in the nucleus that has no charge
  8. 14. this tells you the number of protons
  9. 17. Earth is this many AUs from the sun
  10. 19. Pluto is this type of planet
  11. 21. measures things outside of our solar system
  12. 24. particle in the nucleus that has a positive charge
  13. 25. an atom of hydrogen has this many neutrons
  14. 27. this contains our solar system plus lots of other stars and planets