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Ch 7
Test Description: Earth Science
Instructions: Answer all questions to get your test result.
1) Dry, flat lake beds located in the center of basins in arid areas are called
A
allevuial fans
B
playas
C
desert pavements
2) A cone of debris deposited by running water at the mouth of a canyon in an arid area is known as a
A
delta
B
alluvial fan
C
ephemeral stream
D
arroyo
3) What force causes most of the erosion in desert areas
A
running water
B
ice
C
gravity
D
wind
4) Why can a heavy rain shower cause a large amount of erosion in a desert area
A
there is a lack of vegetation to hold the soil in place
B
desert ground cannot absorb water
C
streams overflow easily
D
temperatures are very high
5) The rust colored tint of some desert landscapes is the result of
A
flash flooding
B
the intense heat of the sun
C
mechanical weathering
D
chemical weathering
6) What is the main type of weathering in the desert
A
chemical weathering
B
weathering by water
C
weathering by organic acids
D
physical weathering
7) In the desert envrironment the chemical weathering of rocks is generally reduced because
A
moisture is lacking and organic acids are scarce
B
rocks are scarce in the desert
C
most rocks are buried deep under the soil
D
the soil is so well developed
8) The weathered debris in deserts consists mainly of
A
unchanged rock and mineral fragments
B
chemically altered rock fragments
C
organic material from decaying plants
D
a thick soil layer
9) Which of the following statements is NOT true about weathering in deserts
A
most weathering in the deserts is physical weathering
B
the red color of soil and rocks in deserts is caused by chemical weathering
C
there is no chemical weathering in deserts
D
there are thin soils in the desert
10) Abrasion changes the desert by
A
creating pinnacles and narrow pedastals in the rock
B
cutting and polishing exposed rock surfaces
C
depositing loess across the landscape
D
creating blowouts
*select an answer for all questions
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