Erosion and Mass Wasting Flashcards
_______ is the process that transports the products of weathering
Erosion
Erosion is the process that ______ the products of weathering
transports
what is erosion?
the process that transports the products of weathering
what is the cause of mass wasting?
Mass wasting is due to the force of gravity constantly pulling things down hill
Erosion can happen via a…
flowing fluid aka water erosion
What are the primary forces of water erosion?
rivers and streams
How does erosion happen in streams?
In streams particles are carried downstream (transported) and broken down as they are transported
Different ______ particles move in different ways along the stream
sized
Larger particles move as _____ _____
bed load
Bed load is when…
larger particles creep along slowly at the bed or bottom of a stream
Medium sized particles move by a process known as ______
saltation
What happens in saltation?
Medium sized particles are picked up for short periods of time and bounced along the stream bed
Small particles move as ______ _____
suspended load
Suspended load is when…
particles are either carried for short-term or long-term suspension.
____- _____ suspension is when small particles are carried for the length of the stream
long-term
If you see a muddy, turbid stream that means it has a lot of particles carried in _______.
suspension
Glaciers are flowing _______.
ice
Glaciers can carry large sediment such as…
boulders
Once glaciers move through an area, what happens?
the whole landscape is changed very significantly, in a way that it is not changed by water or wind.
How can a landscape be significantly changed?
by the erosive action of ice/glaciers
the constant pull of _____ slowly shapes land directly and indirectly.
gravity
What is mass wasting?
downslope loss of soil and rock
What are two broad types of mass wasting?
Slope failure and flow
What are the three different types of slope failure?
fall, slide, and slump
Fall, slide, and slump slope failure all involve the movement of material ______
downslope
Fall is…
material that falls
Slide is…
when material falls down a well-defined plane of sliding
An example of a slide is
a rock slide
Slump occurs along a ______ slope
rounded
a slump is…
a rotational movement along a slope
What are the four types of flows?
- solifluction
- Mudflow
- creep
- avalanche
We classify flows in terms of
slow, fast, wet, dry
Solifluction is a ____ and ____ flow
wet, slow
Mudflow is a ____ and _____ flow
wet, fast
Creep is a ____ and ____ flow
dry and slow
Avalanche is a ____ and ____ flow
dry and fast
wet flows are called….
slurry
dry flows are called…
granular
creep is…
the constant creeping of material down a hillside
an example of creep is…
trees with curved trunks
