EQ: How are rocks classified?
Vocabulary
 igneous rock
 These rocks are formed
when hot liquid cools
and solidifies.
Vocabulary
 igneous rock
 These rocks are formed
when hot liquid cools
and solidifies.
Classifying Igneous rocks = “Magma vs. Lava”
 Intrusive
igneous rock – igneous
rocks formed when magma cools
slowly beneath the Earth’s surface.
 Extrusive
igneous rock – igneous
rocks formed when lava cools quickly
on top of the Earth’s surface.
Vocabulary
 sedimentary rock
 These rocks are formed
when fragments from
minerals and other rocks
become cemented
together.
Vocabulary
 sedimentary rock
 These rocks are formed
when fragments from
minerals and other rocks
become cemented
together.
Vocabulary
 sedimentary rock
 These rocks are formed
when fragments from
minerals and other rocks
become cemented
together.
Classifying Sedimentary rock – “Pieces of Me”

Clastic sedimentary rock – made from
fragments of other rocks and minerals.

Chemical sedimentary rock – solutions
of dissolved rocks and minerals.

Organic sedimentary rock – rock with
fossils and plant or animal remains.
Vocabulary
 metamorphic rock
 These rocks are formed
when rock material is
exposed to heat and/ or
pressure.
Vocabulary
 metamorphic rock
 These rocks are formed
when rock material is
exposed to heat and/ or
pressure.
Vocabulary
 metamorphic rock
 These rocks are formed
when rock material is
exposed to heat and/ or
pressure.
Classifying Metamorphic Rock – “I’m a changed
rock, honest!”

Contact metamorphism – when rock changes
because it comes in contact with magma.

Regional metamorphism – rock changes at
areas where there is high pressure.
Metamorphic Rock (continued)

Foliated metamorphic -rocks that have
minerals aligned in what LOOKS LIKE layers.

Nonfoliated metamorphic rocks do not have a
pattern in the crystals.