What is energy?

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Across
  1. 3. energy is not created nor lost, but it is _______
  2. 7. the energy between protons and neutrons
  3. 10. the process of changing energy from one kind to another
Down
  1. 1. the force that causes things to move
  2. 2. the unit for measuring energy
  3. 4. E=mc2
  4. 5. an object made up of chemical components has _____ energy
  5. 6. kinds of energy are called "energy ______"
  6. 8. the state of existing in something as permanent
  7. 9. energy is the ability to do ______