| A | B |
|---|
| Biodiversity | Term used to indicate the number and diversity of species on Earth. |
| Endangered Species Act | 1973 act of U.S. congress designed to protect any plant or animal species in danger of extinction. |
| Endanger species | A species whose numbers have fallen so low that it is likely to become extinct in the near future. |
| Exotic species | Species that is not native to a particular region. |
| Poaching | Illegal hunting. |
| Threatened Species | Species likely to become endangered if protective measures are not taken immediately. |
| Electric Generator | Device that converts mechanical energy into electric energy. |
| Fossil fuels | Organic substances such as coal, oil, and natural gas that is used as an energysource and is formed from the remains of organisms that lived millions years ago. |
| Geothermal Energy | Energy that is drawn from heat with the earth and used to drive electric generators. |
| Nuclear Fission | Process in which subatomic nucleus are open apart, releasing huge amounts of energy. |
| Nuclear fusion | The process in which light weight atomic nuclei combine to form a heavier nucleus releasing huge amounts of energy; basically the opposite of nuclear fission. |
| Passive solar heating | System in which sunlight is used to heat buildings directly without pumps or fans. |
| Solar cells | Devices that convert the sun's energy directly into energy. |
| Solar energy | Energy from the sun. |
| Solar water heating | System that uses solar energy to heat waterfor household use. |
