JOURNAL #31
1.
2.
What is the rock cycle?
Can one type of rock change into another
type of rock?
TODAY WE WILL IDENTIFY THE 3
MAJOR TYPES OF ROCK AND
EXPLAIN HOW EACH TYPE FORMS.
Chapter 6
ROCKS
 The
material that makes up the solid
parts of the Earth is known as rock.
 Rock can be a collection of one or
more minerals or can be made of
solid organic matter.
 There are 3 major types of rocks
3 MAJOR TYPES OF ROCK
1.
2.
3.
Igneous Rock
Sedimentary Rock
Metamorphic Rock
IGNEOUS ROCK



Mean “from fire”
Forms from magma or molten rock,
cools, and hardens.
Magma is lave when it is exposed at
Earth’s surface.
SEDIMENTARY ROCK




Rock that has been eroded by weather
or waves
Rock, mineral crystals, and organic
matter that is broken down into
fragments
The sediment is carried away and
deposited by water ice and wind.
When sediment deposits are
compressed or cemented together and
harden, sedimentary rock forms.
METAMORPHIC ROCK
 Formed
by tremendous pressure and
extreme heat
 Existing rock undergoes these
changes to become metamorphic rock
LET’S REVIEW:
 What
are the 3 major types of rock?
 How
is igneous rock formed?
 How
is sedimentary rock formed?
 How
is metamorphic rock formed?
THE ROCK CYCLE
 Rock
Cycle- the changes of a rock
from one type to another type of
rock.
 Much of the Earth’s continental
crust has probably passed through
the rock cycle many times during
Earth’s history.
PROPERTIES OF ROCKS
 Each
rock type breaks down and changes
differently based on it’s chemical and
physical properties.
 A Geologist named Bowen studied how
minerals crystallized from magma
 He learned that as magma cools, certain
minerals tend to crystalize first.
 Bowen proposed a pattern that explains the
order in which minerals form
 This chart is known as Bowen’s Reaction
Series.
BOWEN’S REACTION SERIES
 Bowen’s
reaction series -the simplified
pattern that illustrates the order in which
minerals crystallize from cooling magma
according to their chemical composition and
melting point.
 See page 127
 Chemical stability- is a measure of the
tendency of a chemical compound to maintain
its original chemical composition rather than
break down to form a different chemical.
LET’S REVIEW
 What
 Why
is rock cycle?
do rocks break down at different rates?
 What
is Bowen’s reaction series?
LET’S REVIEW
 Draw
the Rock cycle
 Describe
how a rock changes into a different
type of rock.
YOUR ASSIGNMENT:
 Draw
and COLOR the rock cycle
 Your drawing must include:
A colored picture of each rock type
 Arrows with an explanation of how the rock type
changes
 Title- “The Rock Cycle”

RUBRIC




Color (15 points)
Title (5 points)
Arrows (10 points)
Label: (5 points each)
 Igneous Rock
 Sedimentary Rock
 Metamorphic Rock
 Magma
 Volcanoes
 Erosion
 Transportation
 Weathering: wind/rain
 Deposition
 Metamorphism
 Melting
 Crystallization
 Cooling
 Pressure