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Classifying Rocks
On Fire
Layer It On
Whole New Rock
Never Ending
100
Three things geologists observe and use to classify rocks
What is mineral composition, color, and texture
100
Form from cooling magma or lava
What are igneous rocks
100
Form when particles of other rocks or remains of plants and animals are pressed and cemented together
What are sedimentary rocks
100
Form when an existing rock is changed by heat, pressure, and chemical reactions
What are metamorphic rocks
100
series of processes on Earth's surface and in the crust and mantle that slowly change rocks from one kind to another
What is the rock cycle
200
The look and feel of a rock
What is texture
200
One forms above ground from cooling lava. The other forms below ground from cooling magma.
What is extrusive and intrusive
200
small, solid pieces of material that come from rocks or living things
What is sediment
200
grains are arranged in parallel layers
What is foliated
200
Erosion leads to ____________ rock
What is sedimentary
300
The way the three major rock groups (igneous, sedimentary, metamorphic) are classified
What is how the rocks form
300
Intrusive rocks cool _______________ and form __________ grain. Extrusive rocks cool _______________ and form __________ grain.
What is slowly and coarse. Quickly and fine
300
The process of forming sedimentary rocks
What is erosion, depositon, compaction, cementation
300
Grains are arranged in random order
What is nonfoliated
300
Requires underground heat and pressure in the cycle
What is metamorphic rock
400
The way to describe a rock's grain
What is fine and coarse
400
A rock is darkly colored because _________
What is a low silica content
400
A type of sedimentary rock that forms from remains of plants or animals. EX: coal forms in swampy areas
What is organic rock
400
Two uses of metamorphic rock
What is material for building and statues
400
Three options for sedimentary rock in the cycle.
What is 1. erosion 2. heat and pressure 3. melting
500
A dark colored rock that has low silica content with crystals to small to be seen without a hand lens.
What is basalt
500
An intrusive rock with large crystals surrounded by small crystals; forms when magma cools slowly at first, then rapidly
What is porphyry
500
A sedimentary rock formed from rock fragments that are squeezed together.
What is clastic rock
500
After heat and pressure are applied _________ turns into slate
What is shale
500
Forces inside the Earth affect the rock cycle because
What is forces of Earth create magma necessary to form igneous rock