Energy

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Across
  1. 2. the change of energy from one form to another
  2. 3. The strength and vitality required for sustained physical or mental activity
  3. 7. the energy possessed by a body by virtue of its position relative to others
  4. 8. form of hydropower that converts the energy obtained from tides into useful forms of power
  5. 9. sources that will run out or will not be replenished in our lifetimes
  6. 10. Energy that a body possesses by virtue of being in motion
  7. 11. energy from a source that is not depleted when used
  8. 12. Flowing water creates energy that can be captured and turned into electricity
Down
  1. 1. the total energy of an isolated system in a given frame of reference remains constant
  2. 4. the sum of kinetic and potential energy in an object that is used to do work
  3. 5. The heat from the Earth
  4. 6. radiant energy emitted by the sun