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Science 8
Study
| Vocabulary | Definition |
|---|---|
| habitat | the natural home or environment of an animal, plant, or other organism. |
| groundwater | water that exists underground in saturated zones beneath the land surface. |
| water cycle | the continuous movement of water within the Earth and atmosphere. |
| evaporation | the process that changes liquid water to gaseous water (water vapor). |
| transpiration | a process that involves loss of water vapour through the stomata of plants. |
| precipitation | water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. |
| tributary | a freshwater stream that feeds into a larger stream, river or other body of water. |
| watershed | an area of land that drains all the streams and rainfall to a common outlet such as the outflow of a reservoir, mouth of a bay, or any point along a stream channel. |
| divide | the elevated boundary separating areas that are drained by different river systems. |
| reservoir | an artificial lake where water is stored. |
| eutrophication | occurs when the environment becomes enriched with nutrients, increasing the amount of plant and algae growth to estuaries and coastal waters. |
| salinity | the measure of dissolved salts in water |
| sonar | Sound Navigation and Ranging. |
| seamount | an underwater mountain formed by volcanic activity. |
| trench | long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another. |
| continental shelf | part of the continental margin which is between the shoreline and the shelf break or, where there is no noticeable slope, between the shoreline and the point where the depth of the superjacent water is approximately between 100 and 200 metres. |
| abyssal plain | a flat region of the ocean floor, usually at the base of a continental rise, where slope is less than 1:1000. |
| mid-ocean ridge | an elevated region with a central valley on an ocean floor at the boundary between two diverging tectonic plates where new crust forms from upwelling magma. |
| current | a flow of electrical charge carriers, usually electrons or electron-deficient atoms. |
| Coriolis effect | circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. |
| Climate | the “average weather |
| El Nino | a warming of the ocean surface, or above-average sea surface temperatures, in the central and eastern tropical Pacific Ocean. |
| La Nina | the periodic cooling of ocean surface temperatures in the central and east-central equatorial Pacific. |