Science Vocab

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Across
  1. 3. a small body of matter from outer space that enters the earth's atmosphere
  2. 7. space rocks
  3. 9. about the same mass as a proton but without an electric charge
  4. 10. space research
  5. 13. earth science
  6. 15. The fifth planet
  7. 17. state of matter
  8. 18. Only Saturn has..
  9. 19. state of matter
  10. 20. based on or characterized by the methods and principles of science
Down
  1. 1. positive electric charge
  2. 2. the force that attracts a body toward the center of the earth
  3. 4. the process of eroding or being eroded by wind, water, or other natural agents
  4. 5. a group of atoms bonded together
  5. 6. a basis for reasoning
  6. 8. facts and statistics
  7. 11. looking at something to gain information
  8. 12. systematic investigation
  9. 14. state of matter
  10. 16. Our Planet