Crossword Detectives: Investigating Energy

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Across
  1. 3. Energy associated with the flow of electrons.
  2. 6. A source of fuel from plant materials and animal waste.
  3. 7. British Thermal Unit
Down
  1. 1. The flow of electrical energy or charge.
  2. 2. The process of controlling resources.
  3. 3. The ratio of useful energy to the energy supplied to it.
  4. 4. The potential energy locked in a system, released by chem reactions.
  5. 5. A significant change in a measure of climate.