Across
- 4. Wright Brothers invented
- 6. the amount of matter present in a body
- 8. the most common element found in our universe
- 9. scientist who discovered gravity
- 10. The amount of moisture in air is its
Down
- 1. planet is known as the Red Planet
- 2. chemical element with the symbol C
- 3. longest bone in human body
- 5. Simple machines that use ropes or chains are
- 7. the rate at which someone or something moves