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Multiple Choice Quiz
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For each question below, choose the letter corresponding to the BEST answer.



1

A rock is:
A)only produced by cooling of magma.
B)an aggregate of minerals.
C)any hard, solid substance on earth.
D)a naturally occurring, hard, solid substance.
2

The clastic sedimentary rocks:
A)range from conglomerates to shales.
B)form near Earth’s surface.
C)form from pieces of pre-existing rocks.
D)all of these
3

Where do sediments come from?
A)Sediment is transported and deposited all over the Earth.
B)Rock weathering produces sediment.
C)Sediments accumulated as dust fell to Earth from outer space.
D)There have always been sediments on Earth.
4

Based on your experience, which of these environments will produce sediments with cross-bedding?
A)a desert
B)a tropical rain forest
C)a swamp
D)the deep ocean
5

Particles of sediment from 1/16 mm to 2 mm diameter are called:
A)clay.
B)silt.
C)sand.
D)gravel.
6

Rounding is:
A)weathering of sharp edges and corners of bedrock exoposed at Earth's surface.
B)the grinding away of sharp edges and corners of rock fragments during transportation.
C)the relative sphericity of a grain.
D)all of these
7

Compaction and cementation are two common processes associated with:
A)lithification.
B)sedimentation.
C)transportation.
D)erosion.
8

Which of the following is not a chemical sedimentary rock?
A)limestone
B)rock salt
C)rock gypsum
D)All of these are chemical sedimentary rocks.
9

The major difference between breccia and conglomerate is:
A)all of these are differences between breccia and conglomerate.
B)grain composition.
C)grain rounding.
D)grain size.
10

Which of the following is not a type of sandstone?
A)orthoquartzite.
B)graywacke.
C)arkose.
D)All of these are types of sandstone.
11

Shale differs from mudstone in that:
A)there is no difference between shale and mudstone.
B)shale has smaller grains than mudstone.
C)shale is layered and fissile whereas mudstone is massive.
D)shale has larger grains than mudstone.
12

The chemical element found in dolomite that is not found in limestone is:
A)oxygen.
B)magnesium.
C)carbon.
D)calcium.
13

A body of sedimentary rock of considerable thickness and with features that distinguish it from adjacent rocks is:
A)an outcrop.
B)a bedding plane.
C)a formation.
D)a contact.
14

If sea-level drops or the land rises, what is likely to occur?
A)a decrease in the value of shorefront property
B)a tidal wave
C)a transgression
D)a regression
15

The process whereby rocks are changed to sediment is called:
A)compaction.
B)weathering.
C)deposition.
D)lithification.
16

A sedimentary rock composed of angular particles of gravel is called:
A)gravelstone.
B)sandstone.
C)conglomerate.
D)breccia.
17

Sedimentary particles with a size range larger than 256 mm:
A)cobbles.
B)clay.
C)boulders.
D)gravel.
18

A layer in which the grain size changes vertically through the layer is called:
A)is not observed in nature.
B)graded bedding.
C)cross-bedded.
D)foliated.
19

Cross-bedding observed in sand dunes can be used:
A)to determine the height of the sand dune.
B)to determine the speed of the wind.
C)to determine the direction the wind was blowing.
D)all of these
20

Sedimentary rocks provide clues about:
A)polar climates.
B)tropical climates.
C)temperate climates.
D)Earth surface conditions at the time the sediment was deposited.







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