Across
- 2. Energy that is collected from the Sun
- 5. Materials such as minerals, trees, and water that occur naturally and can be used
- 7. Thermal energy generated and stored in the Earth
- 9. A healthy environment where the natural resources are not being overused is called __________.
- 11. An area's ability to create an ongoing supply of renewable resources and absorb waste
- 12. A device that converts the wind's kinetic energy into electrical energy
- 15. The impact of a person or community on the environment
- 16. The process of converting waste materials into new materials and objects
- 17. A unhealthy environment where the natural resources are being overused is called __________.
- 18. Unrefined petroleum
Down
- 1. Electricity produced by running water moving a turbine
- 3. Energy that is collected from resources that cannot be replenished on a human timescale
- 4. Energy that is collected from resources that are naturally replenished
- 6. A natural fuel formed in the geological past from the remains of living organisms
- 8. Organic materials produced in a renewable manner that can be used to create energy
- 10. The process of maintaining change in a balanced environment
- 13. A fuel derived directly from living matter
- 14. A naturally occurring liquid found beneath the Earth's surface that can be refined into fuel