Across
- 2. plant or animal material used as fuel to produce electricity or heat.
- 3. in passive solar building design, windows, walls, and floors are made to collect, store, reflect, and distribute solar energy, in the form of heat in the winter and reject solar heat in the summer.
- 5. an electrochemical cell that converts the chemical energy of a fuel and an oxidizing agent into electricity through a pair of redox reactions.
- 7. Hydroelectricity, or hydroelectric power, is electricity produced from hydropower.
- 8. energy that is collected from renewable resources that are naturally replenished on a human timescale.
- 9. using less energy to perform the same task
- 10. systems that use solar energy to heat a fluid
Down
- 1. thermal energy in the Earth's crust which originates from the formation of the planet and from radioactive decay of materials in currently uncertain but possibly roughly equal proportions.
- 4. energy that is collected from renewable resources that are naturally replenished on a human timescale
- 6. the effort made to reduce the consumption of energy by using less of an energy service.