Across
- 3. Energy Any source of energy that is limited and cannot be replaced when it is used, such as oil, coal, and natural gas.
- 4. (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.
- 5. The process of controlling resources; for example, limiting soil erosion, reducing sediment in waterways, conserving water, and improving water quality.
- 7. External surroundings.
- 10. Effect The phenomenon whereby the earth's atmosphere traps solar radiation, caused by the presence in the atmosphere of gases such as carbon dioxide, water vapor, and methane that allow incoming sunlight to pass through but absorb heat radiated back from the earth's surface.
- 11. Plant materials and animal waste used especially as a source of fuel.
- 13. Energy Energy associated with the flow of electrons.
- 14. The ability to do work; types include heat, light, sound, chemical, nuclear, mechanical, electrical.
Down
- 1. Fuel A natural fuel such as coal or gas formed in the geological past from the remains of living organisms.
- 2. The flow of electrical power or charge.
- 6. Energy stored in the earth in the form of heat.
- 8. The ratio of the useful energy delivered by a dynamic system to the energy supplied to it.
- 9. Energy The potential energy locked within a system and released during a chemical reaction.
- 12. Change Any significant change in measures of climate, such as temperature, precipitation, or wind, lasting for an extended period of a decade or longer.