Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
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
This sedimentary rock is often used for writing on blackboards and is commonly white
Chalk
100
This is how metamorphic rocks are created.
Extreme heat and pressure
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
These small pieces or particles make up sedimentary rock. They can be other rocks or plant and animal organisms
Sediments
200
These types of rocks can become metamorphic rocks
Igneous, sedimentary and other metamorphic rocks
300
What are rocks made up of?
Minerals, sediments, magma, lava.
300
What is the process of transformation from liquid to solid rock called?
Solidification
300
This rock is formed from compacted layers of organic material like dead plants. It is a common source of fossil fuel.
Coal
300
Which metamorphic rock is often used in sculptures and architectural structures due to its smooth texture and ease of carving?
Marble
400
In what types of rocks are you most likely to find fossils?
Sedimentary
400
This type of igneous rock is black with a glassy texture. 
Obsidan
400
Before they become solid rock, sediments must be "glued" together. What is the term for this binding process?
Cementation
400
The texture of a metamorphic rock arranged in parallel layers is called
Foliated
500
Igneous rock cools very quickly. When it forms, the rock crystals could be described as _________.
Smooth or shiny or no visible crystals
500
This extrusive igneous rock can float in water, and some people use it to clean their feet. It has many air bubbles.
Pumice
500
Ezra observed a rock that he found at the beach. He concluded that the rock was sedimentary. Which observation best supports this conclusion?
Layers within the rock
500
What does metamorphic mean?
To change form