Chapter 9

Front 1

bed load

Back 1

describes sediments that are too heavy or large to be kept in suspension or solution and are pushed or rolled along the bottom of a streambed

Front 2

delta

Back 2

triangular deposit, usually made up of silt and clay particles, that forms where a stream enters a large body of water

Front 3

floodplain

Back 3

broad, flat, fertile area extending out from a stream's bank that is covered with water during floods

Front 4

meander

Back 4

curve or bend in a stream formed when a stream's slope decreases, water builds up in the stream channel, and moving water erodes away the sides of the streambed

Front 5

runoff

Back 5

water that flows downslope on Earth's surface and may enter a stream, river, or lake; its rate is influenced by the angle of the slope, vegetation, rate of precipitation, and soil composition

Front 6

solution

Back 6

in a stream, is created when materials, such as silica (SiO2), calcium (Ca), and sodium (Na), dissolve in the stream's water

Front 7

stream bank

Back 7

ground bordering each side of a stream that keeps the moving water confined

Front 8

suspension

Back 8

state in which small particles, such as silt or sand, are held up and carried along by the turbulence of a stream's moving water

Front 9

watershed

Back 9

land area drained by a stream system

Front 10

Surface Water Movement

Back 10

-earth’s water supply is recycled in the water cycle
-water molecules evaporate from a body of water, condense into cloud droplets, fall as precipitation back to earth’s surface and then soak into the ground

Front 11

Stream channel

Back 11

narrow pathway carved into sediment or rock by the movement of surface water

Front 12

Young Stream

Back 12

water moves fast, large pieces of sediment flows with the channel

Front 13

mature stream

Back 13

water picks up speed as it move but not as fast at young stream. Stream picks up large pieces but leaves sand behind

Front 14

old stream

Back 14

water moves slow and collects larger sediments

Front 15

eutrophication

Back 15

process by which lakes become rich in nutrients from the surrounding watershed, resulting in a change in the kinds of organisms in the lake