Across
- 5. Plant materials and animal waste used especially as a source of fuel.
- 6. The process of controlling resources; for example, limiting soil erosion, reducing sediment in waterways, conserving water, and improving water quality.
- 7. The flow of electrical power or charge.
- 9. Energy The potential energy locked within a system and released during a chemical reaction.
- 13. Energy stored in the earth in the form of heat.
Down
- 1. Energy Any source of energy that is limited and cannot be replaced when it is used, such as oil, coal, and natural gas.
- 2. External surroundings.
- 3. Fuel A natural fuel such as coal or gas formed in the geological past from the remains of living organisms.
- 4. The ratio of the useful energy delivered by a dynamic system to the energy supplied to it.
- 8. Energy Energy associated with the flow of electrons.
- 10. Change Any significant change in measures of climate, such as temperature, precipitation, or wind, lasting for an extended period of a decade or longer.
- 11. The ability to do work; types include heat, light, sound, chemical, nuclear, mechanical, electrical.
- 12. (British Thermal Unit) The heat equal to 1/180 of the heat required to raise the temperature of one pound of water from 32 degrees Fahrenheit to 212 degrees Fahrenheit at a constant pressure of one atmosphere.