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