Investigating Energy

1. The ratio of the useful energy delivered by a dynamic system to the energy supplied to it.
3. Energy associated with the flow of electrons.
4. A natural fuel such as coal or gas formed in the geological past from the remains of living organisms.
6. The process of controlling resources; for example, limiting soil erosion, reducing sediment in waterways, conserving water, and improving water quality.
9. A result of a force moving an object a certain distance.
13. 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.
14. Plant and animal waste used as a source of fuel.
17. The energy that a piece of matter has because of its position or nature or because of the arrangement of parts.
19. The ability to do work; types include heat, light, sound, chemical, nuclear, mechanical, electrical.
20. The use of flowing water from waterfalls and dams to produce electricity.
21. The power of the atom.
22. Energy produced by mechanical devices, such as gears, pulleys, levers, or internal combustion engines.

2. The potential energy locked within a system and released during a chemical reaction.
5. External surroundings.
7. Any significant change in measures of climate, such as temperature, precipitation, or wind, lasting for an extended period of a decade or longer.
8. Energy from the sun.
10. The energy possessed by a body as a result of its motion.
11. Energy stored in the earth in the form of heat.
12. The rate at which work is performed or energy is expended.
15. The unit of energy or work in the MKS system of units, equal to the work done by a force of one Newton-meter.
16. Energy derived from wind by means of windmills or wind turbines.
18. A measure of power equal to one joule of work per second.