Science Puzzle time

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Across
  1. 2. when distance decrease, gravitational force increases
  2. 3. force of attraction between objects due to their mass
  3. 5. A push or pull
  4. 7. force that resist of sliding surfaces
  5. 8. friction-like forces, opposes motion in a fluid
  6. 10. resist in change of motion
  7. 11. gravity increase with mass of each object
Down
  1. 1. forces that resist movement of two surfaces touches
  2. 4. combination of all forces
  3. 6. objects that travel around each other in space
  4. 9. where object experiences the forces