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26 Cards in this Set
- Front
- Back
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how range of percentage of the weight of all living things is water?
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75 to 95 percent
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how much percentage of water is the earth covered by??
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75 percent
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What are the two major categories that aquatic ecosystems are divided into
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saltwater/marine water, freshwater
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What is the water cycle/hydrologic cycle
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the sequence at which water travels from the air to the earth and back into the atmospheree
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what is the driving force behind the water cycle
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solar radiation
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________ falls in some form of precipitation
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water vapor
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precipitation that reaches the soil moves into the ground by a method called ....
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infiltration
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what is ground water
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it is some water that enters the soil which seeps down to an impervious layer of clay or rock
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some of the rainfall eventually makes it's way to the coast into saltwater transition the rest of the runoff
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evaportes
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what governs the rate of evaporation
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the amount of water vapor in the air relative to saturation vapor pressure
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define transpiration
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plants cause additonal water loss from the soil. through their roots they take in water and lose it through the leaves and other organs. or evaporation from the leaves of plants
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what is evapotranspiration
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it is the total amount of waterloss through ground vegitation
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Aquifers recharge their supply through
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rainfall
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where did the ogallala aquifer originate from
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rivers that have flowed eastward from the rockies over millions of years
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the amount of light reflected from the surface depends on ...
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the angle at which the rays strike
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why would deep water organisms have very large eyes
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give them max light gathering ability
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what is a thermocline
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the region of vertical depth wher the temperature declines most rapidly
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the thermocline is located between and upper layer of warm lighter less dense water called the ..
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epilimnion
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the deeper layer of cold dense water is called the...
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hypolimnium
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what gives rise to changes in the vertical depth profile of water
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seasonal input of solar radiation
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the position of the thermocline is permanant in..
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the tropical waters
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it what zone does larger bodies of water experience a mixing of the epilimnion and hypolimnion in the fall and spring
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in the temperate zone
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this factor varies with flowing bodies of water
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temperature profile
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what solute mostly makes of sea water
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sodium chloride
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what is saliinity expressed in
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practical salinity units ..psu
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what is diffusion
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the general tendency to move from and area of high concentration to a lower concentraion
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