Science (4th) Ch. 5 Lesson 3 - Weathering and Erosion (vocab & notes) Flashcards
the breaking down of rocks into smaller pieces
weathering
the removing of weathered rock
erosion
the dropping off of eroded soil and bits of rock
deposition
a large, slow-moving buildup of snow and ice
glacier
the downhill end of a glacier where glacial till and other debris are deposited
terminus
mounds of rocky materials deposited at the edge of a glacier
moraine
The ___________ can create features by depositing the sediment it is carrying.
wind
Wind that slows down after passing a rock or going over a hill loses energy. The wind will then drop any sand it may be carrying, forming ______________. This dropping is called _____________.
sand dunes
deposition
Rock is broken down and moved to another place during the process of __________ and __________.
weathering
erosion
_________ & ___________ are two types of physical weathering.
freezing
thawing
Freezing & thawing are two types of ____________.
physical weathering
_________ & _________ are also causes of physical weathering.
plants growing
flowing water
Plants growing & flowing water are also causes of _____________ weathering.
physical
If a rock contains ______, air and water can react with the iron through _____________ and form ________.
iron
chemical weathering
rust
The surface of the Earth is changed ________ by ___________, earthquakes, and _____________.
rapidly
landslides
avalanches
True or False
When a glacier bottom begins to melt, the glacier begins to slide and tears at the ground.
True
The _________ of rock debris carried by a glacier are called ______________.
mounds
moraines
Large rocks left behind by glaciers are known as _____________.
glacial debris
The slow process that breaks rocks into smaller pieces is called ________________.
weathering
A rock is broken apart by ______________ weathering if the rock type does not change.
physical
If a rock contains iron, air and water can react with the iron through ____________ and form rust.
chemical weathering
The weathering and removal of rock from one place to another is called __________.
erosion
Erosion can be caused by glaciers, wind, moving water, and ______________.
gravity
When the Colorado River eroded the land around the river in Arizona, the _______________ was formed.
Grand Canyon
Glaciers form in very cold places as thick ____________ of ice.
sheets
As the weight of the overlying ice increases, the glacier begins to ________________.
melt and flows.
Deposits left behind by a glacier are called ______________ and _____________.
glacial debris
glacial till
The mounds that form where till builds up are called _______________.
moraines.
Most processes change land slowly, but people can make ___________ changes.
fast
People change the land by _____________ it to get minerals, metals, or fuels.
mining
