Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
The Rock Cycle
100
Geologists classify rocks into 3 major groups
What is igneous, sedimentary, and metamorphic
100
Igneous rock that formed from magma and cooled very slowly UNDERNEATH the earth's surface is called ________.
What is intrusive rock
100
These small pieces or particles make up sedimentary rock. They can be other rocks or plant and animal organisms
What is sediments
100
This is how metamorphic rocks are created.
What is extreme heat and pressure
100
Magma cools and crystallizes in the cycle forming _______ rock
What is igneous rock
200
The type of rock that forms from magma or lava cooling
What is igneous rock
200
This type of rock is formed from lava ON the earth's surface.
What is extrusive rock
200
This type of rock can be found on the local streets during the winter.
What is rock salt
200
These types of rocks can become metamorphic rocks
What is igneous, sedimentary and other metamorphic rocks
200
Igneous rock transform to sediment by processes called ___________ & ____________
What is weathering and erosion
300
The small units that make up a rock and its texture are called __________.
What is grains
300
This action causes holes to form in extrinsic rock when it is formed.
What is gases being released.
300
Sedimentary rocks can form from deposits made in ___________
What is streams or oceans
300
The process in which magma comes in contact with existing rock
What is contact metamorphism
300
The layers of sediment become pressed together over time
What is compaction
400
Geologists study the ________ & ________ of a rock in order to identify it.
What is texture and composition
400
This type of igneous rock is black with a glassy texture. There is a picture in your textbook.
What is obsidan
400
This type of rock is formed by organisms. Coal was the example we gave in class.
What is the biochemical rock
400
The texture of a metamorphic rock arranged in parallel layers is called
What is foliated
400
The tectonic process that forces rocks onto the earth's surface is called __________
What is uplift
500
Igneous rock cools very quickly.When it forms the rock could be described as _________.
What is smooth or shiny or no visible crystals
500
This igneous rock can float in water, it also has holes due to the release of gases
What is pumice
500
This type of sedimentary rock is made up of broken pieces of rock and minerals
What is clastic rock
500
Limestone becomes ___________ under extreme temperature or pressure.
What is marble
500
The processes by which sediments become sedimentary rocks
Deposition, compaction or cementation
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