Science Review Chapter 4 Grade 8 Sections 1 & 2

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Across
  1. 3. fixed point a lever pivots around
  2. 6. force force exerted by the machine
  3. 9. rigid bar free to pivot or rotate about fixed point
  4. 10. machine utilizes 2 or more simple machines
  5. 11. much like inclined plane wrapped around a cylinder
  6. 13. device thick at one end and tapers to a thin edge
  7. 14. advantage output force divided by input force
  8. 16. device changes amount of force exerted
  9. 18. tough connective tissue attaching muscles to bone
Down
  1. 1. a unit of work equal to one newton-meter
  2. 2. compares machine's output to input work
  3. 4. force exerted on an object that causes it to move
  4. 5. plane a flat surface with one end higher
  5. 7. grooved wheel with a rope wrapped around it
  6. 8. force force you exert on the machine
  7. 12. and axel two circular fastened together & rotate
  8. 15. toothed wheels that fit one into another
  9. 17. teeth shaped liked wedges