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EnvironmentalSci
Final 9th grade
| Term | Definition |
|---|---|
| Biodiversity | The sum total of all organisms in an area, taking into account the variety of species, their genes, their populations, and their communities, called biodiversity. |
| Genetic diversity | The differences in DNA among individuals within species and populations is called genetic diversity. |
| Treaty | When nations ratify a treaty, they promise to uphold the laws that are described. |
| Captive breeding | The process of raising organisms in controlled conditions, such as zoos and botanical, is called captive breeding. |
| Species diversity | Species diversity is the number or variety of species in the world or in a particular region. |
| Latitudinal gradient | A scientific study counted more ant species near the equator than near the North Pole, which demonstrates a natural pattern called the latitudinal gradient. |
| Mass extinction | Based on current data about species populations trends, some scientists claim we are in the middle of Earth's sixth mass extinction. |
| Extinction | A species is extinction to an area if it is found nowhere else in the world. |
| Biodiversity hotspot | A biodiversity hot spot is an area that supports an especially high number of endemic species, but is rapidly losing biodiversity. |
| Physical Hazard | Some ongoing natural phenomena, such as ultraviolet(UV) radiation from sunlight, represent physical hazard. |
| Genetic | Some diseases, such as breast cancer, can be traced to genetic factors in addition to environmental hazards. |
| Allergens | Substances known as allergens cause the immune system to overreact to a normally harmless substance. |
| Volcano | a volcano is an opening in the Earth's crust through which molten lava, ash, and gases are ejected. |
| Tornado | A tornado is a type of windstorm in which a funnel of rotating air drops down from a storm cloud and touches Earth's surface. |
| Climate | Climate describes the pattern of atmospheric condition in large geographic regions over long period of time. |
| Smog | If you combine the words smoke and fog, you get the word smog. |
| Ozone hole | The term ozone hole hole was used to describe the area of lowered ozone concentration over Antarctica. |
| Air pollution | Air pollution is the release of damaging materials into the atmosphere. |
| Clean air act | In the u.s, the clean air act, a law initially passed in 1963, protects and improves the quality of air in order to to safeguard human health and the environment. |
| Water diversion | The process of moving water from its from its source to some place where humans use it, such as homes and farm fields, is called water diversion. |
| Point source | Point source pollution comes from discrete or species locations. |
| Biological | Biological pollution is caused by pathogens, disease-causing organisms. |
| Water table | In an aquifer, the boundary between the zone of aeration and the zone of saturation is known as the water table. |
| Agriculture | Globally, about 70 percent of our fresh water is used for agriculture. |
| Reservoir | A large lake that stores water for humans a reservoir. |
| Algal bloom | An algal bloom is a sudden explosion of algal growth caused by excess nutrients. |
| Thermal | Thermal pollution occurs when water is returned to its source at a temperature that is higher than when it is taken, |
Created by:
Nataja
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