Across
- 2. resistance when surfaces slide past each other
- 3. to resist change in motion
- 6. what causes acceleration or change in motion
- 8. substance made of two or more elements chemically joined
- 10. rule that describes behavior in nature
- 12. how much matter is in something
Down
- 1. what causes objects to fall toward Earth
- 4. the work or energy you put in
- 5. scientist who formulated the laws of motion
- 7. to draw something toward you
- 9. to move something by applying force
- 11. to increase speed over time