Across
- 2. - Study of movement.
- 5. - Up and down
- 7. - a part of something that affects a result.
- 8. - Force that pulls you down to earth.
Down
- 1. - Increase of speed.
- 3. - Anything that will push or pull.
- 4. - Move by itself - no human control.
- 6. - People that design roller coasters.