Gravity crossword

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Across
  1. 2. measures by how much space an object takes up or what it is made of.
  2. 4. largest planet in our solar system.
  3. 6. dwarf planet that was originally considered a planet
  4. 8. The force that pulls objects toward each other.
  5. 9. is The guy who discovered gravity.(last name)
Down
  1. 1. is a measure of the gravitational pull on the object.
  2. 2. the planet closest to the sun
  3. 3. center of our solar system
  4. 5. giant rock "a bit more than a quarter the size of Earth".
  5. 7. 6th planet from the sun, gas planet known for its rings