Vocab
Breaking down existing rock is called
Weathering
How many minerals have we identified?
Over 4,000
This rock cools so fast that no crystals form
Obsidian
What is the rock cycle?
The processes of rocks transforming from one type to another
These rocks are light colored
Felsic
What does the Mohs scale measure?
A minerals hardness
These rocks form from the accumulation of pre-existing rock and mineral fragments
Sedimentary rocks
Rock is broken down and carried somewhere else
Weathering and erosion
These rocks have bands of minerals in parallel layers
Foliated
What is a mineral's streak?
The colored powder left behind on a streak plate
This rock forms from molten rock that crystalizes and solidifies
Igneous rock
This occurs when eroded particles sink and become a new layer of sediment
Deposition
This textures comes from rock cooling inside/below earth
Intrusive
What is the highest number on the Mohs scale?
10
Metamorphic rocks
Metamorphic rocks turn into magma
Rock melting
The process by which a rock's structure is changed by heat and pressure
Metamorphism
What does "minerals have definite chemical compositions" mean?
They can be represented with chemical formulas
Organic sedimentary rocks come from
biological activity
When sediments are smushed and glued together
Compaction and cementing