Across
- 3. its used to research in space
- 4. a force that keeps birds in the air
- 5. it's a force that makes you fall
- 8. its a force that helps things stay on the ground
Down
- 1. a man made machine that can fly
- 2. to copy nature
- 6. a force that is pushing against an object that is moving
- 7. an animal that fly’s in nature