Weathering And Erosion: Question Preview (ID: 30516)

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Peanuts and soybeans(legumes) enrich the soil because they contain ________ -fixing bacteria in their roots.
a) oxygen
b) carbon
c) nitrogen
d) argon

________ is the decomposed organic material found in soil.
a) hummus
b) clay
c) bedrock
d) humus

__________ is the loose, weathered material on Earth's surface.
a) bedrock
b) lichens
c) soil
d) mantle

_________ is the most important cause of chemical weathering.
a) wind
b) pressure changes
c) oxidation
d) water

Which of these is chemical weathering?
a) water freezing in the cracks of rocks
b) lichens produce weak acids that dissolve rock
c) wind blows sand against rocks
d) rocks crumbles after repeated expansion and shrinking

Plants roots can expand in existing cracks and split rocks open.
a) true
b) false

_______ splits rock when water freezes and expands in existing cracks in rock.
a) ice wedging
b) abrasion
c) release of pressure
d) oxidation

Processes that break down rock at Earth's surface.
a) erosion
b) sublimation
c) weathering
d) revolution

The extreme loss of topsoil due to drought in the 1930's is called
a) Hurricane Andrew
b) the Dust Bowl
c) the Great Blizzard
d) the Great Dirt Storm

To put nutrients back into the soil, farmers alternate between 2 crops. This is called
a) contour plowing
b) conservation plowing
c) crop rotation
d) irrigation farming

Farmers can keep the old plant stalks on the field during the summer to keep the soil from blowing during the winter. This is called
a) conservation plowing
b) crop rotation
c) contour plowing
d) hydroponic gardening

Material moved by erosion is called
a) deposition
b) sediment
c) a waterfall
d) a cirque

Mass movement is erosion caused by
a) water
b) wind
c) glacier
d) gravity

Water that does not evaporate or sink into the ground is referred to as
a) condensation
b) hail
c) runoff
d) sublimation

A ________ is a stream or small river that flows into a larger river.
a) tributary
b) flood plain
c) kettle
d) valley glacier

A meander is a _______ in the course of a river.
a) waterfall
b) beach
c) delta
d) bend

Karst topography is associated with the presence of ______
a) waterfalls
b) caves
c) glaciers
d) kettle lakes

_________ is scraping or scratching.
a) abrasion
b) deflation
c) plucking
d) moraine

_______ is glacial till deposited at the front and side edges of a glacier.
a) delta
b) sand dune
c) moraine
d) alluvial fan

______ is fine, wind-deposited sediment.
a) loess
b) moraine
c) delta
d) hoodoo

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