Rocks
Why are rocks important?
Find new mineral resources
Answer questions about Earths past
Used in practically everything
Clean our water
True or False
Igneous Rocks are the cooling of magma forms?
True
They are classified as?
Foliated or non foliated
Sedimentary rocks are formed by?
The accumulation of sediments
What is Obsidian?
Obsidian is an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure
What are the three main types of Rocks?
Igneous, Sedimentary, Metamorphic
Igneous rocks are rocks that form from?
Cooling of magma or lava
Metamorphic have been modified by?
heat, pressure, and chemical processes
What are the three main types of Sedimentary rocks?
Clastic sedimentary
Chemical sedimentary
Organic Sedimentary
What is the most common color for Obsidian?
Black
Series of events that change rocks from one type to another
Rock Cycle
Magma is?
molten rock above the Earths Surface
Where are metamorphic rocks found?
Deep in earths crust or at place
What are Clastic sedimentary rocks form from?
The accumulation and lithification of mechanical weathering debris
Where does Obsidian form?
Above earths serface
What are Rocks?
The mixture of minerals, glass, or organic materials
What is Lava?
Molten rock above the earths surface
What is foliated metamorphic rock?
Has a layered or banded appearance that is produced by exposure to heat and directed pressure
What are Chemical sedimentary rocks formed?
When dissolved materials preciptate from solution
What is the hardness of Obsidian?
5.5
What is Parent Rock?
Original rock
Before metamorphosis
Crystal Sizes
Faster cooling (aboveground)= What?
Smaller crystals= smooth texture
What is non foliated metamorphic rocks?
Does not have a layered or banded appearance
What are Organic sedimentary rocks form from?
The accumulation of plant or animal debris
What is the Composition of Obsidian?
Rhyolite and Grantite