streams Flashcards

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1
Q

the initial driving force

evaporation and then condensation

A

sun

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2
Q

mountain range

a streams beginning

A

source

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3
Q
a streams end 
another body of water 
ocean 
lake 
River
A

mouth

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4
Q

landform at mouth that projects into another quiet body of water
Mississippi
Nile

A

delta

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5
Q

a River and all of its tributaries

A

River system

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6
Q

a stream that ends in the main River

A

tributary

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7
Q

the area of land drained by a River system

A

drainage basin

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8
Q

watersheds

all of the water that falls in a certain watershed will remain in the watershed

A

basins

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9
Q

ridges that separate watersheds
two major divides (continental) in the US
Appalachians and Rocky Mountains

A

divide

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10
Q

V-shaped
down-cutting
few tributaries

A

youthful- stage 1

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11
Q

floodplain develops

more tributaries

A

mature- stage 2

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12
Q

meandering channel, lots of tributaries
wide floodplain
oxbows and cut-offs

A

old stage- stage 3

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13
Q
channel and v-shaped valley 
floodplain
point bar
cut bank
tributaries 
source
mouth and delta 
meanders and oxbow lakes
A

parts of a River

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14
Q

water overflows banks and floods the floodplain
caused by heavy rainfall, snow melt
most pronounced in the spring
most erosion occurs during this

A

flooding

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15
Q

large material carried alon the bed or bottom of the stream

boulders, pebbles, and sand

A

bed loads

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16
Q

material that is held in suspension

clay and silts

A

suspend load

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17
Q

minerals that have been dissolved by the water

can’t be seen, must be tested chemically

A

dissolved load

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18
Q

the amount of water moving by a certain point of a stream
multiply the volume of a River by its velocity and you will get discharge
usually measured in cubic feet per second
speed depends mostly on a streams gradient
volume usually depends on amount of rainfall and drainage basin size

A

discharge

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19
Q

a period in which ice extends farther than normal
last one began about 1 million years ago
returned to normal about 12000 years ago

A

Ice ages

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20
Q

cool summers

little or no ice melts

A

period of cooling

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21
Q

what causes cooling

A

change in Suns energy
earths tilt, orbit
change in positions of continents
volcanos

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22
Q

leads to cooling of the polar regions

A

milankovitch cycle

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23
Q

changes CO2 content
less CO2
less global warming gases
reef building

A

limestone

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24
Q

form in mountains

rivers of ice

A

alpine valley

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25
Q

ice sheets
cover 100-1000 square miles
Greenland and Antarctica

A

continental glaciers

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26
Q

grinding of bedrock
Rock is carried by glacier and scratches bedrock
glacial grooves

A

abrasion

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27
Q

glacier grabs rocks and pulls them out of the ground

A

pucking

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28
Q

huge, flat areas

A

Great Plains

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29
Q

huge flat areas
glacial grooves
the Great Lakes
rebound terraces

A

continental- erosional

30
Q
piles of unlayered sediment 
lateral 
medial
end
recessional
terminal
moraines
A

depositional features

31
Q

layered

A

outwash

32
Q
sediment deposited by the glacier 
till
outwash
drumlins
eskers
Kames
kettle lakes
moraine-dammed lakes
A

continental deposits

33
Q

formed by waves weathering and eroding the shoreline

A

erosional

34
Q

waves attack land

A

erosion

35
Q

caused by storms off shore

A

waves

36
Q

length of open water

larger this is the larger the waves

A

FETCH

37
Q

deposit eroded material

A

sand and clay

38
Q

weathering and erosion from waves

A

rocky shore

39
Q

sand is pushed back from the deeper water

gulf coast of Florida

A

shells

40
Q

storms cause beaches to erode

short wavelengths

A

winter

41
Q

long wavelengths
sand pushed onto shore
beaches get rebuilt

A

summer

42
Q

wavelength/ period (ft/sec)

A

wave speed

43
Q

depth is 1/2 of wavelength

A

wave energy

44
Q

form when wave feels bottom

A

breaker

45
Q

wave is bent as it feels bottom
wave energy is concentrated on headlands
causes water and sand to move parallel to shore

A

wave refraction

46
Q

land that protrudes into the ocean

A

headland

47
Q

zigzag motion in surf zone

A

smash and backwash

48
Q

movement of loose earth material down a slope
driving force is gravity
can happen quickly or slowly
Gravity is the driving force, but water is usually the trigger

A

mass movement

49
Q
steep slope
over- steepening due to humans 
overloading the top of the e slope
deforestation or removal of vegetation 
weak material such as shale is not resistant to weathering and erosion
A

how slides occur

50
Q

includes all precipitation that falls on land
moves downhill due to gravity
water comes together and forms streams and rivers
an agent of weather and erosion

A

running water

51
Q

falls through the air

A

fall

52
Q

tumbling down the hill

A

flow

53
Q
slides down the hill
Material can be divided into 
Rock
mud
debris
A

slide

54
Q

arid regions characterized by less than 25 cm of rain per year
often hot, but dry, cold places like Antarctica qualify as these too

A

deserts

55
Q

what does warm air do at the equator

A

rises

56
Q

when does the dry air sink

A

when is reaches 30°

57
Q

caused by mountains

A

rain shadow effect

58
Q

rocks shaped by wind
desert varnish
desert pavement

A

ventifacts

59
Q

a hill made out of sand created by a series of winds

form in different shapes and sizes

A

sand dunes

60
Q

crescent shaped with horns of the dune pointing downwind

A

barchan

61
Q

a giant ripple like sand dune formed at a right angle to the direction of the prevailing winds

A

transverse dunes

62
Q

depositional features made of bills of sand that are stabilized by vegetation at each end
blowout

A

parabolic dunes

63
Q

depositional feature formed when wind is parallel to dune direction

A

longitudinal dunes

64
Q

resembles a star because the wind direction is variable

A

star dunes

65
Q

wind blown sediments

deposits can be very thick

A

loess

66
Q

water that flows underground

water is in the pore spaces of the rock

A

groundwater

67
Q

empty space in a rock

A

porosity

68
Q

concealed space in rocks

rate of water flowing through rock

A

permeability

69
Q

high porosity
high permeability
holds water

A

sandstone

70
Q

low permeability

no water

A

Shale