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Rocks walcott Test

Enter the letter for the matching Answer
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1.
Different minerals melt and crystallize at different temperatures.
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2.
Sandstone, with abundant quartz and orthoclase feldspar, is among the most durable of igneous rocks.
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3.
Extrusive rocks, which cool more rapidly than intrusive rocks, are generally more ____.
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4.
Rock that is very high in iron and magnesium.
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5.
Landslides, moving water, wind, and glaciers cause ____________________ of surface materials.
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6.
_________________________ are characteristic of sediments transported by water and wind.
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7.
Landslides create sorted deposits when sediment moves downhill in a jumbled mass
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8.
What type of bedding has the heaviest and coarsest material is on the bottom
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9.
What type of sediment particles have worn surfaces and rounded corners
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10.
What results when rocks come in contact with molten rocks such as those in an igneous intrusion?
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11.
The metamorphism of limestone results in the formation of
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12.
A(n) ____________________ is a vein of extremely large-grained minerals.
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13.
The percentage of open spaces between mineral grains in clastic rocks is its ____________________.
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14.
A rare, ultramafic rock that might contain diamonds is a(n) ____________________.
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15.
Porphyritic textures indicate that magma has cooled very slowly throughout crystallization.
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16.
As the water content of rock increases, the melting point ____.
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17.
Dark-colored rock such as gabbro that is rich in iron and magnesium
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18.
Igneous rocks that cool quickly on Earth’s surface are ____.
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19.
Vein of extremely large-grained minerals
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20.
Texture characterized by large, well-formed crystals surrounded by finer-grained crystals of the same mineral.
A.
pegmatitie
B.
false slowly, then quickly
C.
porphyritic
D.
graded
E.
contact metamorphism
F.
ultramfic rock
G.
marble
H.
extrusive
I.
kimberlite
J.
true
K.
sorted deposits
L.
clastic
M.
false, unsorted
N.
porosity
O.
erosion
P.
finely grained
Q.
decreases
R.
false, granite
S.
mafic rock
T.
pegamite
Type the Answer that corresponds to the displayed Question.
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21.
Valuable ore deposits are often associated with igneous extrusions.
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22.
Much of Earth’s surface is covered not by solid rock, but by ____________________.
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23.
Light-colored rock such as granite that has high silica content
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24.
Igneous rocks are rarely used as building materials because of their strength, durability, and beauty
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25.
During sedimentary rock formation, cementation occurs before weathering
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26.
A(n) ____________________ rock, such as dunite, has low silica content and very high iron and magnesium content.
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27.
A rock that has grains of two different sizes has ____________________ texture.
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28.
Because of its large mass, coarse-grained clastics such as gravel tend to be transported by low-energy flows of water
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29.
Rocks are formed when magma _______.
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30.
Valuable ore deposits and gem crystals are often associated with

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