Energy

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