Rock Types
Processes
Formation
Pathways
100
What are the three classes of rocks?
What are the three classes of rocks? Answer: Sedimentary, Igneous, and Metamorphic
100
Follow the arrow from sedimentary rock to metamorphic rock. What process is necessary to change a sedimentary rock to a metamorphic rock?
Heat and/or pressure
100
How is magma formed?
From melting rock
100
Can an igneous rock become another igneous rock? If so, how?
Yes, by melting again and then cooling.
200
What type of rock is formed from 1. cooling magma and 2. cooling lava?
1. Intrusive Igneous Rock
2. Extrusive Igneous Rock
200
How does magma become igneous rock?
Cooling
200
How do sediments become sedimentary rock?
Deposition, compaction, and cementation
200
What is an example of weathering?
Wind / rain / human or animal activity / plant growth / ice
300
Which type of rock is typically formed from layers of sediment compressed together?
Sedimentary Rock
300
How are sediments formed?
Weathering
300
What is the first step in the formation of sedimentary rocks?
Weathering
300
Which process cannot happen?
a. Igneous rock-> heat and or pressure-> metamorphic rock
b. Igneous rock-> weathering/erosion->deposition-->cementation->sedimentary rock
c. Metamorphic rock->melting-> cooling->igneous rock
d. Sedimentary rock->melting-> cooling->metamorphic rock
d. Sedimentary rock->melting-> crystallization->metamorphic rock
400
What type of rock forms under extreme heat and pressure?
Metamorphic Rock
400
What process turns igneous rock into metamorphic rock?
Heat and/or pressure
400
Which process is essential for the formation of metamorphic rocks but not for sedimentary rocks?
Heat
400
How can magma eventually become sedimentary rock?
Cooling to igneous, weathering and erosion to become sedimentary
500
Name a sedimentary rock mentioned in your notes or class activities
sandstone, conglomerate, limestone
500
How does igneous rock become sedimentary rock (name the 5 processes)?
Weathering and erosion, followed by deposition, compaction, and cementation
500
Describe how metamorphic rocks can become igneous rocks.
By melting to magma, then cooling
500
Describe a path in the rock cycle that involves all three rock types.
Sedimentary rock can transform into metamorphic rock through heat and pressure, then melt into magma and crystalize into igneous rock.