Across
- 2. Force applied over a distance
- 5. A way to test scientific ideas
- 7. Where you can observe stars and planets
- 8. Speed in a given direction
- 9. Newton developed a famous one about gravity
Down
- 1. Force responsible for keeping planets in orbit
- 3. Distance traveled per unit of time
- 4. The path a planet follows
- 6. A large object that orbits a star
- 7. Newton was a famous one of these