Glossary of 6th Grade Freshwater at Earth's surface
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- Water that doesn't sink in, but instead runs across Earth's surface.
- meandering stream
- a river that usually develops on low slopes and carries a lot of fine sediment, such as silt and clay
- point bar
- a pile of sand and gravel that is depositied on the inside of a meander
- braided stream
- streams with many bars and islands separated by river channels
- Platte River is an example of...
- braided stream
- drainage basin
- specific area that is drained by a stream
- an elevated area of land that separates the drainage basin of one stream from the drainage basin of another
- sediment that is carried by a stream
- 3 types of load
- bed load, suspended load, dissolved load
- forms where streams deposit sediment into a body of water
- Alluvial fan
- forms where a stream deposits sediment onto a flat area of land.
- stream discharge
- the volume of water flowing through a stream in a given amount of time. Measured in meters cubed per second.
- region of land next to the stream channel that is covered by water during a flood
- What are 3 ways streams are formed?
- Natural lakes--formed when glaciers created large depressions in earth.
crustal movements--creating depressions that then filled with water
human-made--from dams for example
- compoinds such as nitrates and phosphates that are used by plants, algae, and some plankton to help them grow
- an increase in nutrients and organisms that is a normal part of a lake's life. Eventually the lake will become dry land.
- mixing of lake water that causes nutrients from deep in the lake to move upward toward the surface.
- areas of land that are covered with water druing some part of the year
- wetlands where the most common types of plants are trees and shrubs...found where water is slow moving
- a type of wetland that doesn't have many trees or shrubs...sometimes called wet meadows
- formed in depressions that were created by glaciers...rain is the only source of freshwater here
- point source pollution
- pollution that enters water from a specific loacation...you can see exactly where the water comes from
- non-point source pollution
- when pollution comes from a wide area such as lawns, construction sites, and roads...difficult to control because it's hard to tell where it comes from
- environmental protection agency
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