Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
Random
100
When studying rock sample, geologists observe the rock's mineral composition, color, and this.
What is texture?
100
Igneous rocks are classified according to their origin, texture, and this.
What is mineral composition?
100
This is small, solid pieces of material that come from rocks or living things.
What is sediment?
100
These are two things that are required to form a metamorphic rock.
What are heat and pressure?
100
Lava that cools slowly form these kind of crystals.
What are large crystals?
200
Most rocks are made up of particles of minerals called these.
What are grains?
200
The word "Ignious" means this.
What is fire?
200
This is a sedimentary rock that forms when rock fragments are squeezed together.
What is clastic?
200
These are metamorphic rocks that have their grains arranged in parallel layers.
What is foliated?
200
This is the term used to describe how light is reflected from a mineral's surface.
What is luster?
300
Geologists use a rock's grain size, shape, and pattern to describe this.
What is texture?
300
This type of rock is formed from lava that erupted onto the Earth's surface.
What is Extrusive?
300
This type of rock forms when minerals dissolved in a solution crystallize.
What is chemical?
300
These are the two most useful metamorphic rocks.
What are marble and slate?
300
Reactivity to acid is an example of this.
What is a special property?
400
This rock is generally a light-colored rock that has high silica content.
What is granite?
400
This igneous rock has a long history as a building material.
What is granite?
400
This type of sedimentary rock forms when the remains of plans and animals are deposited in thick layers.
What is organic?
400
These are metamorphic rocks that have their grains arranged randomly.
What are nonfoliated rocks?
400
This means not coming from once-living material.
What is inorganic?
500
This rock is a dark-colored rock that is low in silica.
What is Basalt?
500
This rock forms when magma hardens beneath the Earth's surface.
What is Intrusive?
500
These are the four steps most sedimentary rocks are formed through.
What are erosion, deposition, compaction, and cementation?
500
The word "foliated" comes from the Latin word meaning this.
What is leaf?
500
This is a hollow rock lined with crystals.
What is a geode?
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