Challenge It

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Across
  1. 2. The measurement of how much matter is in an object.
  2. 4. Gravity, magnetism, and electricity are all one of these.
  3. 7. The thing that keeps earth moving around the sun.
  4. 8. The force that pulls objects toward earth.
  5. 10. The law that states every particle has a gravitational pull.
Down
  1. 1. The man who first thought about why things fall.
  2. 3. The type of force gravity is.
  3. 5. Spinning or circling around.
  4. 6. The amount of gravity acting upon an object.
  5. 9. The force drawing objects together.