Download Rock G.N. - Lyndhurst Schools

Name ___________________________________________ Block __________ Date _________________
Rocks
These rocks are at the bottom of the Grand
Canyon and are very old. They have certain
characteristics that allow geologists to identify
exactly what type of rock they are. All rocks do
not look the same. Geologists use the different
characteristics of rocks to categorize the
different rock types on Earth.
What is a rock?
A geologist can tell how a rock was formed just
by looking at it!!
Rock: __________________________________________________
__________________________________________________________
__________________________________________________________
__________________________________________________________
Grains: ________________________________________________
__________________________________________________________
These two rocks mostly contain quartz. They
look different because they formed in different
ways.
 Both _______________ are made of ________________
____________________.
• The ________________________ of the _______________
give clues to how the___________________________.
Classifying rocks
Three major types of rocks:
___________________ ___________________
__________________
Igneous Rocks: ______________________________________
__________________________________________________________
• ______________________________________________________
• ______________________________________________________
Formation of Igneous Rocks
As ______________ or ____________ cools, _______________
________________ begin to form, which are the
_______________ of new ____________________________.
*Magma: Molten rock inside Earth.
*Lava: Molten rock that erupts onto Earth’s
surface (outside Earth).
Igneous Rock
**_________________ is the source for Igneous rocks.
___________________ and ______________________are used
to classify ___________________________________.
_________________ from _______________ and _____________
form the _______________ of a new____________________
______________.
Texture:_______________________________________________
__________________________________________________________
____________ at _________________________
cools quickly, so ________________do
NOT have much time to
_______________________.
Geologist describe the texture
of igneous rocks with small
crystals as_______________________.
Deep below Earth’s surface,
_______________cools ____________,
the ________________ have more
time to grow.
Geologist describe the
texture of igneous rocks with
large crystals as
__________________________.
Classifying Rocks: Sedimentary Rocks
Sediment: ____________________________________________
__________________________________________________________
**Sediments is the source material for
_____________________________
Formation of Sedimentary Rocks
Lithification: _________________________________________
__________________________________________________________
Classifying Rocks: Metamorphic Rocks
Extreme _____________________________ and
____________________ can cause change in rocks.
Parent Rock: __________________________________
New rock formed is called _________________________
Metamorphic Rocks: _______________________________
__________________________________________________________
__________________________________________________________
• The _____________________ DOES NOT ____________–
they remain solid –__________________ and,
sometimes, _________________________________ of
the ___________________________________.
Two main textures of Metamorphic Rocks:
• __________________________________________________
• __________________________________________________
Foliation: __________________________________________
__________________________________________________________
__________________________________________________________
Nonfoliation: _________________________________________
__________________________________________________________
** Foliation is the most obvious
characteristic of metamorphic rocks**
Rocks in Everyday Life
Rocks are abundant natural resources that are
used in many ways based on their physical
characteristics.
Some Igneous rocks are hard and durable...
Ex. Granite – Some Igneous rocks is soft but
contain small pieces of hard glass, which
makes it useful for polishing and cleaning… Ex.
Pumice.
Natural layering makes sedimentary rock a
high-quality building stone.
Ex. Sandstone and limestone are used in
buildings.
Limestone is also used in cement.