Ch 3-1
How are erosion and deposition different?
erosion moves sediment, deposition is laying down of sediment
The major agent of erosion that shapes Earth’s land surfaces is moving what?
water
What type of energy is involved when a river moves sediment and erodes its banks?
kinetic energy
What is a ridge consisting of mixed debris deposited by a glacier called?
moraine
a long, narrow glacier that forms when snow and ice build up high in a mountain valley
The process by which natural forces move weathered rock and soil from one place to another is called what?
erosion
A wide sloping deposit of sediment formed where a stream leaves a mountain is called what?
alluvial fan
How would a fast-flowing river be most likely to move sand-sized particles of sediment?
it would float or possibly disolve
a glacier that covers much of a continent or large island
The process that lays down sediment in a new location is is called what?
deposition
Wind and water are agents of what?
(Hint)they move sediment from one location to another.
erosion
What happens as gravity pulls water down a slope?
potential energy changes to kinetic energy
Which feature will most likely form when a partially buried ice block melts?
Identify three factors that determine the rate of stream erosion.
volume of flow
shape of streambed
slope
The force that moves sediment in a landslide or mudflow is called what?
gravity
How are deltas formed?
water from a river slows down when it comes to a large body of water, when the water slows down, the sediment is deposited there forming a delta
What causes most sediment to wash or fall into a river?
run off and mass movement
mixture of sediments that a glacier deposits directly on the surface
Explain how sediments eroded by the water in this stream become smoother and rounder in shape.
abrasion makes the sediment break down and the smaller pieces fall off making it smoother and rounder
How are meanders formed?
rivers erode on the outside where the water is moving faster, rivers deposit sediment where the water is moving slower
Why do boulders become smaller as they are moved down a stream bed?
they abrade from other pieces of sediment hitting them and breaking off small pieces
a process where a glacier flowing over the land picks up rocks
As more water flows through a river, its speed will do what?
increase, think volume of flow