Across
- 3. Study of natural phenomena
- 4. Smallest unit of matter
- 8. Orbits Earth
- 9. Causes things to fall
- 10. Third planet from the Sun
Down
- 1. How heavy something is
- 2. Newton did this with gravity
- 5. Motion of planets around stars
- 6. What powers work
- 7. Energy that helps us see