Across
- 3. barrier constructed to hold back water and raise its level, the resulting reservoir being used in the generation of electricity
- 4. Resource -Materials from Earth that cannot be replaced within a reasonable amount of time, such as oil, coal, and natural gas
- 8. -Energy that comes from the natural heat inside the earth
- 9. Resources -A source or supply of energy that can be used to generate electrical power to meet people's needs
- 10. -Fuel made from plants, animals wastes, and decomposing plant and animal tissue
- 12. Energy -Energy that comes from the Sun
- 13. turbine -An engine powered by the wind designed to produce energy.
Down
- 1. -Electricity made from the energy of moving or falling water
- 2. -Materials introduced into an environment that cause damage, discomfort, or instability
- 5. Resource -Materials from Earth that can be replaced by nature within a relatively short period of time, such as trees
- 6. Energy Resource -Energy generated by natural processes that is renewable
- 7. -A device that turns motion into electricity
- 11. Fuels -A natural non-renewable fuel such as coal, oil, or natural gas formed over a very long time in the geological past from the remains of living organisms