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Aquatics 4th 6 Weeks Test
Terms in this set (35)
Why does ice float?
As water freezes, it expands and its density decreases.
What makes water a polar molecule?
Water has positive hydrogen atoms and negatively charged oxygen atoms
The force that acts on the surface of a liquid and that tends to minimize the area of the surface
When adhesion of water molecules to a surface is stronger than cohesion between the molecules
Plants move ground water up to their trunks to their highest leaves due to capillary acton.
Very weak bonds; occurs when a hydrogen atom in one molecule is attracted to the electrostatic atom in another molecule
High specific heat
A property of water. Water can absorb lots of heat before changing temperature.
Attraction between molecules of the same substance
An attraction between molecules of different substances
The temperature at which a liquid changes into a solid 32 degrees f
The temperature at which a liquid changes to a gas 212 degrees f
Liquid to gas
Gas to liquid
Water that flows over the ground surface rather than soaking into the ground
When water that falls from the clouds as rain, snow, hail or sleet, collects in the oceans, rivers, lakes, streams.
Why are wetlands an important ecosystem?
-Reduces flooding by acting like a sponge
-Helps clean water by acting like a filter
-Protects shorelines from erosion
What are examples of wetlands?
Marshes, swamps, estuaries, mangroves, mudflats, ponds
How does the salinity differ between freshwater, brackish, and saltwater ecosystems?
Salt = more than 3% salt
Freshwater = less than 0.5% salt
Brackish= less than 3% salt
What type of water is located in a watershed?
What are the four aquatic life zones in a lake?
Littoral zone, Limnetic zone, Profundal zone, Benthic zone
The area of land drained by rivers that eventually make their way to the sea
Inland basins that do not drain to the sea
Water held underground in the soil or in pores and crevices in rock.
The tidal mouth of a large river, where the tide meets the stream.
Excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
A place where the plants make up the area covered in water are primarily woody plants or trees
A wetland having no woody plants
Deep hole drilled or dug into the ground to reach a reservoir of groundwater
A well in which water rises because of pressure within the aquifer
An organism that makes its own food
An organism that cannot make its own food.
A relationship between two species in which both species benefit
A relationship between two organisms in which one organism benefits and the other is unaffected
A series of steps in which organisms transfer energy by eating and being eaten
A community of organisms where there are several interrelated food chains
Trophic Levels: 10% rule
The 10% Rule means that when energy is passed in an ecosystem from one trophic level to the next, only ten percent of the energy will be passed on.
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