The color of a mineral in powdered form.
What is streak?
The series of processes that change one type of rock into another type of rock
What is the rock cycle?
Molten rock that erupts at the surface
What is lava?
These are broken pieces of rock
What are clasts?
Layers that form a metamorphic rock do not form due to deposition, but do to this "pressing" factor.
This mineral has a 1 on Moh's Hardness scale, and can be scratched by your fingernail.
What is talc?
The fragments that make up a rock
What are grains?
This common igneous rock is an intrusive rock that has visible crystals.
What is granite?
This sedimentary rock is easy to identify near a river bed due to the combination of several rocks in it.

What is conglomerate?
Any process that affects the structure or composition of a rock in a solid state as a result of changes in temperature and pressure.
What is metamorphism?
A property that can be described in a number of wordy ways, such as "metallic", "shiny", "dull", "pearly", or "vitreous".
What is luster?
The cooling and crystallization of magma leads to this kind of rock.
This type of igneous rock shows up when volcanic material erupts and cools and crystallizes on Earth’s surface
What is an extrusive rock?
A type of sedimentary rock that was formed by organisms or contains the remains of organisms
What is a biochemical sedimentary rock?
These metamorphic rocks contain parallel layers of flat and elongated minerals. An example is shown below
A naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.
What is an ore?
Extreme temperatures and pressures lead to existing rocks becoming these new types of rocks
What is a metamorphic rock?
This common igneous rock on the ocean floor cooled quickly, and has small crystals.

What is basalt?
This is not just a sedimentary rock, but also a fossil fuel from the remains of plants.
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What is coal?
These are metamorphic rocks that have mineral grains with a random, interlocking texture

What is marble?
This brown-colored mineral is a great conductor of electricity and is used for wires and plumbing.
Deposition, compaction, and cementation lead to this kind of rock
What is a sedimentary rock?
This glassy-like rock is also known as volcanic glass.
What is obsidian?
The process where weight from layers of sediment forces out fluids and decreases the space between grains.
What is compaction?
The formation of metamorphic rock bodies that are hundreds of square kilometers in size
What is regional metamorphism?