Focus On Earth Science: California Grade 6

Chapter 8: Weathering and Erosion

Standards Review

1.
Surface processes that work to break down rock are called__________. 2.a
A)weathering
B)erosion
C)ice wedging
D)oxidation
2.
How do chemical and physical weathering differ? 2.a
A)physical weathering occurs when rocks are broken by physical processes, and chemical weathering happens when chemical reactions dissolve minerals.
B)physical and chemical weathering can happen with the help of animals.
C)Chemical weathering can occur with the help of water reacting with carbon dioxide, and water has nothing to do with physical weathering.
D)Plant roots can help physical weathering occur, but have no impact on soil when it comes to chemical weathering.
3.
When water mixes with carbon dioxide in the air, it forms __________. 2.a
A)sulfuric acid
B)ozone
C)hydrochloric acid
D)carbonic acid
4.
How is surface area related to chemical weathering? 2.a
A)Decreased surface area allows for more ice wedging.
B)Increased surface area allows for more interactions of rocks with water and oxygen.
C)Increased surface area allows for more interactions of rocks with plants and animals.
D)Decreased surface area allows for more interactions of rocks with water and oxygen.
5.
How does climate affect chemical and physical weathering? 2.a
A)Chemical weathering occurs more rapidly in dry climates and physical weathering occurs more in windy climates.
B)physical weathering occurs more rapidly in warm, wet climates, and chemical weathering occurs more in cold climates.
C)Chemical weathering occurs more rapidly in warm, wet climates, and physical weathering occurs more in cold climates.
D)Chemical and physical weathering occur more rapidly in warm, wet climates.
6.
All of the following EXCEPT __________ can weather rock. 2.a
A)animals
B)freezing and thawing
C)sunlight
D)plants
7.
Physical weathering can result from the action of all of the following EXCEPT __________. 2.a
A)carbonic acid
B)plant roots
C)burrowing by animals
D)ice wedging
8.
Erosion is more common on __________. 2.a
A)on gently sloping hills
B)level ground
C)in valleys
D)steep slopes
9.
How does soil erosion affect topsoil? 2.a
A)It makes it more fertile.
B)It washes it away.
C)It keeps it moist.
D)It moves the topsoil to other areas where it is more needed.
10.
Why is soil erosion more common in areas that lack adequate vegetation? 2.a
A)because the lack of adequate vegetation affects the soil pressure and erosion rate
B)because plant roots help keep the soil in place
C)because soil erosion is stopped by reduced vegetation and there is no rooted vegetation to keep the soil in place.
D)because gravity pulls on the plants and increases erosion
11.
What defines a stream as a young stream? 2.b
A)the size of the stream
B)The period of time the stream has been there.
C)It flows quickly through a steep valley.
D)the location of the stream
12.
Broad, c-shaped curves in streams are called __________. 2.b
A)geysers
B)water tables
C)meanders
D)levees
13.
Which is a deposit of sediment that is parallel to the shore? 2.c
A)wave
B)current
C)tide
D)beach
14.
Creep and mudflows are two types of __________. 2.a
A)chemical weathering
B)gravity
C)mass movements
D)physical weathering
15.
Gravity, ice, wind, and water are agents of __________. 2.b
A)runoff
B)erosion
C)abrasion
D)deflation
16.
A _________ is a depositional feature in California's mountains produced from glacial melting. 2.a
A)moraine
B)V-shaped valley
C)U-shaped valley
D)alluvial fan
17.
Which best describes the landforms that can be found in California? 2.a
A)mountains, deserts, and coasts
B)mountains and deserts
C)mountains, valleys, and deserts
D)mountains, valleys, deserts, and coasts.
18.
In which part of California can most of the deserts be found? 2.a
A)northeastern
B)southeastern
C)northwestern
D)southwestern
19.
Arroyos contain water ______. 2.a
A)only during the dry season
B)all the time
C)only during heavy rains
D)none of the time
20.
U-shaped valleys are formed by __________. 2.a
A)rivers
B)rock slides
C)lakes
D)glaciers
Grade 6
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