Download GUIDED NOTES – IGNEOUS ROCKS Name

TYPES OF ROCKS NOTES
Sept. 27, 2016
• _________________ are made up of minerals.
• Most consist of two or more different ________________________.
• Rocks are classified according to how they were ______________________.
How do rocks form?
• If you squeeze and heat a rock for a few ___________________ years, it can turn into a
new type of rock
3 TYPES OF ROCKS  There are three large classifications of rocks – BASED ON HOW
THEY’RE _________________
THE ROCK CYCLE: The rock cycle is an ongoing process.
The sample diagram illustrates the series of natural processes that can ________________
rocks from one kind to another.
The rock cycle is an example of how Earth ________________________ itself.
**ANY ROCK CAN BECOME ANY OTHER TYPE OF ROCK IF IT GOES
THROUGH THE RIGHT PROCESS**
IGNEOUS ROCKS (VOLCANOES)
HOW THEY FORM: _________________and_____________________ of molten
rock (LAVA or MAGMA)
 Igneous Rocks forms near or around _____________________________.
EXTRUSIVE IGNEOUS ROCK
INTRUSIVE IGNEOUS ROCK
*When cooling takes place rapidly,
*When cooling takes place slowly,
___________________ Earth’s surface
__________________ Earth’s surface
Small or no crystals
Big crystals
Examples: Basalt, Obsidian
Example: Granite
Sedimentary Rocks (Form Near Bodies of Water)
HOW THEY FORM: ________________ (squish) and
_____________________ (stick) of sediments
Forms ______________ bodies of water or where bodies of water use to be
Sedimentary rocks are made up of SEDIMENTS
 Sediments: small, solid pieces of rock, mineral grains, or shell fragments.
o Sediments are formed through the processes of WEATHERING and EROSION
of rocks exposed at Earth’s __________________.
Sedimentary rocks can also form from the chemical depositing of materials that were once
dissolved in water.
(____________________________)
Sedimentary rocks usually have _________________ within them.
Sedimentary rocks are also known for having __________________ as sediments build up on
top of each other.
Metamorphic Rocks (Underneath the Earth’s Surface)
HOW THEY FORM: _____________ and ______________________
Metamorphic Rocks form when ____________ are ________________by great heat and/or
pressure
Metamorphic rocks are heated, squeezed, folded, or ________________________ changed
by contact with __________________________ or tectonic forces.
********THIS ROCK GOES THROUGH CHEMICAL CHANGES*******
 When heat and pressure reach the rock’s _____________________________, it melts
into ______________.
Rock Type
Sedimentary
Metamorphic
Igneous
How it forms
Describe how
they look
What do they
form near or
around