Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
The Rock Cycle
100
Geologists classify rocks into 3 major groups
igneous, sedimentary, and metamorphic
100
Igneous rock that formed from magma and cooled very slowly UNDERNEATH the earth's surface is called ________.
intrusive rock
100
These small pieces or particles make up sedimentary rock. They can be other rocks or plant and animal organisms
sediments
100
This is how metamorphic rocks are created.
extreme heat and pressure
100
Magma cools and crystallizes in the cycle forming _______ rock
igneous rock
200
The type of rock that forms from magma or lava cooling
igneous rock
200
This type of rock is formed from lava ON the earth's surface.
extrusive rock
200
This type of rock can be found on the streets during the winter in climates where it snows.
rock salt
200
These types of rocks can become metamorphic rocks
igneous, sedimentary and other metamorphic rocks
200
Igneous rock transform to sediment by processes called ___________ & ____________
weathering and erosion
300
The small units that make up a rock and its texture are called __________.
grains
300
An extrusive rock with dark color, fine grains and low silica
basalt.
300
This stone is what the Whitehouse is made out of.
sandstone
300
This is a thin rock that was used instead of paper.
slate
300
The layers of sediment become pressed together over time (name the process)
compaction
400
Geologists study the ________ & ________ of a rock in order to identify it.
texture and composition
400
This type of igneous rock is black with a glassy texture. 
obsidian
400
Formed by the accumulation of dead plant matter or animal remains being cemented together.
Biogenic Sedimentary Rocks
400
The texture of a metamorphic rock arranged in parallel layers is called
foliated
400
The tectonic process that forces rocks onto the earth's surface is called __________
uplift
500
Igneous rock cools very quickly.When it forms the rock could be described as _________.
smooth or shiny or no visible crystals
500
This igneous rock can float in water, and some people use it to clean their feet
pumice
500
This type of sedimentary rock is made up of broken pieces of rock and minerals.
clastic rock
500
What does metamorphic mean?
"to change form"
500
The processes by which sediments become sedimentary rocks - three words
Deposition, compaction or cementation