Introduction to energy

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Across
  1. 4. a simple machine made of a rigid beam and a fulcrum.
  2. 7. the sum of kinetic and potential energy
  3. 8. a natural gas such as coal
  4. 11. the process by which energy is transmitted through collision
  5. 12. energy that travels in electromagnetic waves
  6. 14. the ability to do work
  7. 15. energy of an object due to its mass and speed
Down
  1. 1. is the process where energy changes from one form to another
  2. 2. the amount of energy is neither created nor destroyed
  3. 3. the quality of being hot
  4. 5. the rate of doing work
  5. 6. material that permits a flow of energy
  6. 9. the movement cause by a fluid by the tendency of hotter and less dense material
  7. 10. physical quantity that expresses hot and cold
  8. 13. energy in form of heat