Page 115 - Science Course 2 (Book 2)
P. 115
Mo10-L5b: What Changes Earth’s Surface?
glacier Mass wasting is the downhill movement of a large
mass of rocks or soil due to gravity.
a large mass of ice formed by snow accumulation on
land that moves slowly across Earth’s surface. The force of gravity can create landslides, a type of
mass wasting.
Let’s Begin
Moving Earth Materials
Most erosion and transport of sediment occurs by
Weathering produces smaller rocks, which can be f owing water.
moved more easily.
Large rivers cause the most erosion.
Geologists use the term erosion to describe the
moving of weathered material, or sediment, from one As water slows, the sediment in the water is
location to another. deposited on the sides of the river.
Sediment also is deposited when rivers enter oceans
or lakes, creating land features called deltas.
Deposition is the laying down or settling of eroded
material.
Sometimes, wind is strong enough to cause erosion.
Sand dunes and ripples are examples of landforms
made by wind.
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