Science Section 9.3

where do fresh water marshes form?

along the mouth of streams where there are extensive deltas

how does the dissolved oxygen content of the lake change during eutrophication?

decreases

what doesnt contribute to maintaining a lakes water supply?

deposition

the basins of glacial lakes formed

during the ice ages

the successional process that beings with the addition of nutrients and continues with the filling in of a lake

eutrophication

what is a way that a lake cannot form?

eutrophication causes a bog to become flooded

describe the characteristics of a young, healthy lake

high in dissolved oxygen, low in waste, and oxygen from plant photosynthesis

lake usually fill in with sediment and cease to exist after

hundreds of thousands of years

a depression in the landscape that collects and holds water

lake

a dominant bedrock in areas where lakes can be common

limestone

many lakes are found in areas where the dominant bedrock is

limestone

which fertilizers speed up the process of eutrophication?

nitrates and phosphates

a type of lake formed when meanders get cut off

oxbow

name the 6 origins of lakes

oxbow, prehistoric, glaciers, cirques, kettles, and where limestone is dominant

a lake created by people for storing water is a

reservoir

what sources supply water to the lake?

runoffs, springs, and precipitation

what changes occur in the lake as eutrophication continues?

sediments and waste build up, organisms die and decay, and there is an excessive amount of algae growth

what determines where a lake can form?

surface materials

low-lying areas often located near streams that develop from filled-in marshes

swamp

what is eutrophication?

the successional process by which lakes become rich in nutrients from the surrounding watershed resulting in the excessive amount of organic growth

a periodically saturated area that develops after a lake fills in with vegetation

wetland

how does eutrophication speed up?

with the help of fertilizers

Name one lake that is a remnant of prehistoric lakes. (the one mentioned in book)

The Great Salt Lake in Utah