Download Earthquakes, Part I

Types of Rocks
NWSA EES Unit 3.1
What is Rock?
1.
A naturally formed,
non-living Earth
material
2.
Made of minerals
How Rocks Are Different
Rock formed from magma
that cooled underground
(diorite)
Rock formed from lava
that cooled above ground
(andesite)
Both are made of the same materials
Types of Rocks
1.
Igneous
2.
Sedimentary
3.
Metamorphic
Identifying Rocks Video
Igneous Rocks
•
Intrusive: magma that cools below ground and
becomes exposed over time
•
Extrusive: lava that cools above ground and
immediately forms rock
Igneous Rocks Video
Sedimentary Rocks
•
Formed from the
weathering and
erosion of existing
rocks
•
Usually are
compacted and
cemented together
•
Can also form from
precipitates,
typically at the
bottom of the ocean
Metamorphic Rocks
•
Formed when
existing rocks are
buried and deformed
by heat and
pressure
•
Can be formed from
ANY of the three
rock types
•
Just as long as they
don’t melt!
Metamorphic Rocks Video
Processes of the Rock Cycle
1.
Crystallization
•
2.
Erosion and Sedimentation
•
3.
Temperature where minerals turn solid
Includes weathering
Metamorphism
•
Can actually change minerals by heat
Rock Cycle Video