Energy and Engines

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Across
  1. 4. a device that converts energy from a natural source into useful work
  2. 6. a special form of potential energy stored in the bonds that hold chemical compounds together
  3. 7. a number that indicates the antiknock quality of gasoline
  4. 12. anything that takes up space and has mass and weight
  5. 13. the force that occurs when one object pushes against another object
  6. 15. a piece of naturally magnetized ore
  7. 17. a hollow, cylinder shaped compartment in which a piston moves back and forth
  8. 18. the cargo that is carried in the nose of a rocket
  9. 21. burning
  10. 22. a disk that moves back and forth inside a hollow cylinder
  11. 23. the ability to do work
  12. 24. a device that converts gases or vapors into a liquid state
  13. 25. the force of attraction that exists between any pair of objects
Down
  1. 1. a guided military rocket
  2. 2. a wheel of curved blades that spins a drive shaft
  3. 3. the force that resists motion
  4. 5. a jet engine with a large fan at the very front
  5. 8. a jet engine that can function only at high speeds because it has no turbine
  6. 9. the result of a force moving an object
  7. 10. occurs when one object gives some or all of its energy to another object
  8. 11. stored energy
  9. 14. a substance that can flow from one place to another such as a liquid or gas
  10. 16. energy of motion
  11. 19. a jet engine used to power a propeller
  12. 20. a push or pull; necessary for motion