Transcript Document

Changes to Land
Earth and Space
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A river flowing across the rocky surface of the Earth could create
which of the following?
A
Dunes
B
Mountains
C
Canyon
D
Hill
How could students best model the formation and movement
of dunes?
A
Pour water over piles of sand.
B
Slowly drip wet sand into a tub of water.
C
Use a spoon to dig a hole in a tray of sand.
D
Use straws and blow piles of sand.
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Changes to Land
Earth and Space
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Students propped up one end of a tray of sand. They also set up a jar of
water and a rubber hose so that water flowed over the sand. They observed
how the moving water carried the sand downhill and made a small pile of
sand at the bottom of the tray.
When the students created the small pile of sand at the end of the flow of
water, they modeled the formation of which of the following?
A
Dunes
B
Canyon
C
Plain
D
Delta
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Changes to Land
Earth and Space
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What natural force formed the Grand Canyon by slowly cutting
through the rock over many millions of years?
A
A boulder
B
A glacier
C
A river
D
A landslide
A delta is made of sediments deposited at the mouth of a river. A
delta forms where the river meets the ocean because the ocean A
makes the river slow down and deposits sediment
B
contains salt water and rivers have fresh water
C
is usually much colder than the water in the river
D
has powerful currents that weather rock on the shore
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