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Weathering & Erosion

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Which of these does NOT cause mechanical weathering?
a.
ice
c.
burrowing animals
b.
tree roots
d.
carbonic acid
 

 2. 

Mechanical weathering happens faster in a ____ climate.
a.
dry
c.
cold wet
b.
hot
d.
humid
 

 3. 

The difference between mechanical and chemical weathering is ____.
a.
the length of time each takes to break up a rock
b.
that only chemical weathering involves water
c.
the way they affect the makeup of a rock
d.
all of the above
 

 4. 

Ice wedging is caused by ____.
a.
carbonic acid freezing on rocks
c.
water freezing and thawing
b.
water and oxygen reacting
d.
rocks colliding with each other
 

 5. 

Oxidation happens when materials containing ____ are exposed to oxygen and water.
a.
iron
c.
kaolinite
b.
carbonic acid
d.
all of the above
 

 6. 

Mechanical weathering ____.
a.
breaks apart rocks by physical processes
b.
occurs when chemical reactions dissolve or change the minerals in rocks
c.
occurs when iron is exposed to oxygen and water
d.
none of the above
 

 7. 

Chemical weathering ____.
a.
is caused by freezing and thawing
b.
breaks apart rocks by physical processes
c.
happens when chemical reactions dissolve or change the minerals in rocks
d.
none of above
 

 8. 

In areas where freezing and thawing occur frequently, rocks weather rapidly because of the ____ of freezing water.
a.
evaporation
c.
leaching
b.
expansion
d.
oxidation
 

 9. 

When water mixes with carbon dioxide gas in the air or soil, ____ forms.
a.
carbonic acid
c.
calcite
b.
lactic acid
d.
oxygen
 

 10. 

Deposition happens when
a.
water carries sediment
c.
wind carries sediment
b.
ice wedging breaks rocks
d.
wind or water drop the sediment being carried
 

 11. 

What is the most common cause of erosion?
a.
wind
c.
gravity
b.
water
d.
ice wedging
 

 12. 

When sediment is being carried away, what process is happening?
a.
deflation
c.
erosion
b.
abrasion
d.
plucking
 

 13. 

What causes deep ditches across fields called gullies?
a.
wind
c.
water
b.
gravity
d.
glaciers
 

 14. 

Striations or scratches in rocks or the ground are formed by large boulders carried by moving masses of ice and snow called ____.
a.
grooves
c.
glaciers
b.
cirques
d.
creep
 

 15. 

These are formed when wind deposits sediment.
a.
Loess
c.
Eskers
b.
Dunes
d.
Till
 



 
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