science

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