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Types of Rocks
Composition and Identification of Rocks & Minerals
Processes
Igneous Rocks
Changing Rocks
100
This type of rock is formed from sediment.
What is a sedimentary rock?
100
A naturally formed solid made of one or more minerals.
What is a rock?
100
This is the process by which crystals form and grow in size.
What is crystallization?
100
An igneous rock with small crystals formed this way.
What is formed from lava that cooled quickly?
100
This is the process of pressing together layers of sediment.
What is compaction?
200
This type of rock is formed from the cooling of magma or lava.
What is an igneous rock?
200
A solid, naturally occurring, crystalline object with a defined chemical composition.
What is a mineral?
200
These cause all rocks to form cracks.
What are sunlight, wind, water, ice and changing temperatures (weathering)?
200
These two conditions allow mantle rock to melt.
What is a decrease in pressure or addition of water?
200
This is why fossils are usually found in sedimentary rocks.
What is: -the process of forming sedimentary rocks is good for preserving fossils? -animals usually live in low area where sedimentation occurs?
300
A rock formed from a sedimentary rock that was squeezed and heated .
What is a metamorphic rock?
300
A surface along which a mineral cleanly splits.
What is a cleavage plane?
300
This type of energy is involved melting rocks to form igneous rocks.
What is heat energy?
300
An igneous rock with large crystals formed this way.
What is formed from magma below Earth's surface?
300
This is the process by which sediment particles are "glued" together to form a sedimentary rock.
What is cementation?
400
Granite is an example of this.
What is an intrusive igneous rock?
400
A scale to identify minerals based on their hardness or resistance to being scratched.
What is the Mohs Hardness Scale?
400
These are involved in forming metamorphic rocks.
What are heat and pressure?
400
This layer of Earth's interior is what melts to form igneous rocks.
What is Earth's mantle?
400
Low grade metamorphism occurs under these conditions.
What is low heat and low pressure?
500
Basalt is an example of this.
What is an extrusive igneous rock?
500
This test helps to show when you have gold instead of pyrite.
What is the streak plate test?
500
Weathering and erosion are steps in the process of forming this type of rock.
What is sedimentary rock formation?
500
The addition of water to the mantle occurs at these zones.
What are subduction zones?
500
This type of rock is a clue that a mountain range once existed.
What is gneiss?