Gravity

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Across
  1. 2. change of position
  2. 4. keeps things on the ground
  3. 5. outer boundary of an artifact
  4. 6. astronomical object orbiting a star
  5. 9. there's gravity
  6. 10. gravitationally curved path velocity rate of change
  7. 11. burning hot
  8. 12. uses energy from the sun
Down
  1. 1. physical power
  2. 2. the earth is made out of
  3. 3. three different groups
  4. 5. no gravity
  5. 7. strength
  6. 8. earth's satellite