Transcript The Rock Cycle PPT

Bell Work: 10/11/11
Is It a Rock?
Write down the names of the following
items that you believe are rocks:
Cement block
Piece of clay pot
Coal
Dried mud
Coral
brick
Hardened lava
Limestone
A gravestone
Asphalt (road tar)
Iron ore
Marble statue
Glass
Concrete
granite
Explain your thinking. What “rule” or
reasoning did you use to decide if
something is a rock?
Objectives


Identify the major processes that drive the
rock cycle.
Label a diagram that depicts the three
different rock types.
The Rock Cycle
You know that paper, plastic, and
aluminum can be recycled. But did you
know that the Earth also recycles? And
one of the things that Earth recycles is
rock.
Discuss the following questions with your
group:
– What is rock?
– How can rock be recycled?
– How long would recycling a rock take?
– What would the rock look like before,
during, and after the process of recycling?
The Rock Cycle
Scientist define ________
rock
as a
naturally occurring solid mixture of
one or more minerals and organic
matter.
ROCKS ARE ALWAYS CHANGING!
The continual process by which new
rocks forms from old rock material is
rock
cycle
called the _______
________.
The Value of Rock
Rock has been an important natural
resource as long as humans have existed.
Discuss the following questions with your
group:
– How did early humans use rock?
– What are some other ways rock has been
used throughout the centuries?
Let’s look at page 360.
Processes that Shape the Earth
Let’s look at the top of pg. 361
The process in which water, wind,
ice, and heat break down rock is
called ___________.
weathering
Discuss with your group why this is
important.
Weathering is important because it
breaks down rock into fragments
sediment
called __________.
These sediments
sedimentary ______.
rock
make _____________
Processes that Shape the Earth
The process by which the sediment is
removed from its source and carried away
erosion
is called ________.
Causes of erosion:
– Water
– Wind
– Ice
– Gravity
The process in which sediment moved by
erosion is dropped and comes to rest is
deposition
called ____________.
Let’s look at pg. 361
Processes that Shape the Earth
How the cycle continues…
• Buried rock is exposed at the Earth’s
uplift
surface by a combination of _______
erosion
and _______.
• Uplift is ___________
within the
movement
rocks
Earth that causes _______
inside the
Earth to be moved to the Earth’s
surface.
Heat & Pressure
 If
the temperature and pressure are
high enough at the bottom of the
sediment, the sedimentary rock can
change into a ___________
metamorphic ______.
rock
 In some cases, the rock gets hot
enough to melt into _________.
magma
 The magma eventually cools to form
rock
igneous
__________
______.
Rock Classification
Scientist classify rocks by composition and
texture.
The minerals a rock contains determine the
composition of that rock.
___________
Look on page 365.
The size, shape, and positions of the grains
that make up a rock determines a rock’s
___________.
texture
Look on page 366.
The Rock Cycle
Pg. 364
compaction &
cementation
solidification