Bell Work: 10/11/11

1
Bell Work 10/11/11

• Is It a Rock?
• Write down the names of the following items that
  you believe are rocks
• Explain your thinking. What rule or reasoning
  did you use to decide if something is a rock?

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
2
Objectives

• Identify the major processes that drive the rock
  cycle.
• Label a diagram that depicts the three different
  rock types.

3
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?

4
The Rock Cycle

• Scientist define ________ 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 called the _______
  ________.

rock
rock
cycle
5
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?
• Lets look at page 360.

6
Processes that Shape the Earth

• Lets look at the top of pg. 361
• The process in which water, wind, ice, and heat
  break down rock is called ___________.
• Discuss with your group why this is important.
• Weathering is important because it breaks down
  rock into fragments called __________. These
  sediments make _____________ ______.

weathering
sediment
sedimentary
rock
7
Processes that Shape the Earth

• The process by which the sediment is removed from
  its source and carried away is called ________.
  Causes of erosion
• Water
• Wind
• Ice
• Gravity
• The process in which sediment moved by erosion is
  dropped and comes to rest is called ____________.
• Lets look at pg. 361

erosion
deposition
8
Processes that Shape the Earth

• How the cycle continues
• Buried rock is exposed at the Earths surface by
  a combination of _______ and _______.
• Uplift is ___________ within the Earth that
  causes _______ inside the Earth to be moved to
  the Earths surface.

uplift
erosion
movement
rocks
9
Heat Pressure

• If the temperature and pressure are high enough
  at the bottom of the sediment, the sedimentary
  rock can change into a ___________ ______.
• In some cases, the rock gets hot enough to melt
  into _________.
• The magma eventually cools to form __________
  ______.

metamorphic
rock
magma
rock
igneous
10
Rock Classification

• Scientist classify rocks by composition and
  texture.
• The minerals a rock contains determine the
  ___________ of that rock.
• Look on page 365.
• The size, shape, and positions of the grains that
  make up a rock determines a rocks ___________.
• Look on page 366.

composition
texture
11
The Rock Cycle Pg. 364
compaction cementation
deposition
deposition
solidification