Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
The Rock Cycle
100
What are rocks made of?
mixtures of minerals and other materials.
100
Where do igneous rocks form?
on or beneath earth's surface.
100
What does coal form from?
forms from the remains of swamp plants buried in water.
100
How can metamorphic rocks form?
igneous, sedimentary, or other metamorphic rocks.
100
What is the main ingredient in quartz?
Silica
200
What gives a rock its texture?
Grains
200
Many igneous rocks are what?
Hard, Dense, and Durable
200
What are most sedimentary rocks made up of?
broken pieces of other rocks
200
Name two things that can change a metamorphic rock.
Heat and very high pressure
200
Where oceanic plates move apart, what formed from melted mantle rock?
Magma
300
About how many minerals make up most of Earth’s crust?
20
300
What is the most common extrusive rock?
Basalt is the most common.
300
What does the term “organic” refer to?
refers to substances that were once part of living things or were made by living things.
300
What is a common foliated rock?
Slate
300
The granite in Stone Mountain formed how many years ago?
Millions
400
What do geologists observe to study a rock’s mineral composition?
Geologists observe the rock’s mineral composition, color and texture.
400
What does the texture of an igneous rock depend on?
The size and shape of the mineral crystals.
400
What are the three major groups of sedimentary rocks?
clastic rocks, organic rocks, and chemical rocks.
400
Is a foliated or nonfoliated rock?
Nonfoliated
400
There are many what’s by which rocks move through the rock cycle?
Pathways
500
What do geologists use to classify a rock according to its origin?
color, texture, and mineral composition.
500
What is the most abundant type of intrusive rock in continental crust?
Granite
500
Name the process, in order, of how sedimentary rocks are formed. Word Bank: Cementation, Erosion, Compaction, Weathering, and Deposition.
weathering, erosion, deposition, compaction, and cementation.
500
The deeper that a rock is buried in the crust, the greater what is on that rock?
pressure
500
The rock cycle is a series of processes that occur on earth’s surface and in the crust and what?
Mantle
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