Forming Solar Systems Crossword

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Across
  1. 6. a special shape where each point is a constant distance from one point
  2. 8. this describes that the area covered by a planet is the same for the same amount of time
  3. 10. anything that flows
  4. 14. the process of making layers with different densities in a planet
  5. 15. an atom with a different number of neutrons
  6. 16. the mass for a given volume
  7. 17. this is a fancy way of referring to a day
  8. 18. the name for the mathematical relationship between a year and the radius of an orbit
Down
  1. 1. lava is ______ rock
  2. 2. this is like adding up rocks
  3. 3. a pulling force towards an object’s center of mass
  4. 4. in movies with time travel, scientists say you can't meet your past self because it will cause a rip in _________
  5. 5. three laws that describe how objects move due to gravity
  6. 7. this is a fancy way of referring to a year
  7. 9. the path an object in space travels around another
  8. 11. this shape is created by tracing a constant distance from two focus points
  9. 12. the Kepler's Law that describes the shape of Earth's orbit
  10. 13. the method of heat transfer most commonly found in fluids