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49 Cards in this Set

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forming outside on the earth's crust
extrusive
forming inside, under earth's crust
intrusive
molten rock on earth's surface
lava
molten rock beneath earth's crust
magma
extrusive rocks
basalt, obsidian, pumice, rhyolite
intrusive rocks
granite, gabbro
used for building
granite
covers ocean floor
basalt
extrusive igneous rock
formed on the surface
intrusive igneous rock
formed below the surface
slow cooling
large crystals
fast cooling
small crystals
The mineral crystals in obsidian are too small to see without a microscope. This is because it _____.
cooled very quickly
The rock beneath the continents is made of _____.
granite
Which of the following rocks would most likely be formed from an erupting volcano?
basalt
Emily finds a rock with crystals 2 cm large. Her rock _____.
has a coarse texture
individual particle in sedimentary rock
clast
breaking-down process that changes minerals in rock
degradation
chemical sedimentary rock formed when minerals are left behind by evaporated water
evaporite
weathered rock, bone frag., soil, particles carried by wind, water, and ice
sediment
chemical sedimentary rock hanging from the ceiling of a cave
stalactite
mineral crystals
chemical s. rock
remains of dead creatures
organic s. rock
weathered rock particles
clastic s. rock
s. rock usually _____
forms horizontal layers
Gerta finds a sedimentary rock with large clasts cemented together. Each clast is larger than 2 mm. Gerta has found _____.
a conglomerate
Which of the following rocks forms from shells and calcium carbonate?
limestone
stalactites and stalagmites are examples of :
chemical s. rock
Cornelius sees a landform with almost vertical layers of sedimentary rocks. Which of the following statements is most likely true?
a geologic event shifted the rocks
changes in rocks caused by magma seeping into crustal rock; occurs at high temperature and low pressure
contact metamorphism
changes in rocks caused by tectonic plates rubbing sideways against one another; occurs at low to high temperatures and high pressure
dynamic metamorphism
layers or bands found in m. rock
foliation
changes in rocks caused by chemicals in hot water; occurs at low temperature and low pressure
hydrothermal metamorphism
physical, chemical, or structural change
metamorphosis
changes in rocks caused by tectonic plates pushing together; occurs at low to high temperatures and medium pressure
regional metamorphism
Gneiss is a foliated metamorphic rock. It was formed from _____.
directed pressure
metamorphic rocks are formed from
heat, pressure, chemical reactions
sandstone
quartzite
marble
limestone
slate
shale
What rock would most likely be used for roof shingles?
slate
The San Andreas Fault, which runs through California, is two plates sliding sideways past one another. Which type of metamorphism is most likely to occur along the fault line?
dynamic
pressure and chemical processes that transform sediments into rock
lithification
small pieces of weathered, broken down rock
regolith
sinking of one tectonic plate beneath another
subduction
rise of one part of earth's crust above another
uplift
Basalt is pushed into the crust by subduction. It will most likely become _____.
metamorphic rock
A layer of sandstone is uplifted. This rock will most likely _____.
weather into new sedimentary rock
In subduction, _____.
the less dense plate slides over the denser plate