Rocks by ewghwehws

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									       Welcome to Science 11/1
• Put your name on your paper. Divide it into 4
  sections as shown below. This is your 1st
  quarter evaluation. Answer each question
  honestly, this will help make class better for
  you. What do you like best What activity/procedure
         about this class?         that we do on a regular
                                   basis helps you learn
                                   best?

         What is one thing you     What is one thing you
         would change to help      need to do differently in
         make this class better?   order to improve your
                                   grade this quarter?
Today’s Schedule
1. Evaluations
2. Review
3. Begin Next Unit
4. HW Assignment
5. Do not forget-Online Volcano Test
Due Friday: 416731
        Review (Earth’s Layers)
• Earth’s layers can be categorized in two ways:
  Compositon          and           Physical
• Crust                           Lithosphere
• Mantle                          Asthenosphere
• Core                            Mesosphere
                                  Outer Core
                                  Inner Core
              Review (Plates)
• Earth’s lithosphere is broken up into several
  massive pieces called tectonic plates that
  move on top of the asthenosphere (upper
  mantle)
    Review (Convection Currents)
• Convection Currents in the Mantle cause
  Earth’s plates to move. These currents are
  caused by heat from the core.
• The higher the temp. the lower the density.
       Review (plate movement)
• Plates move in three different ways:
• 1. converge (come together) 2. diverge (move
  apart) 3. transform (slide past each other)
  Review (plate movement effects)
• When Earth’s plates move several process can
  happen such as: sea-floor spreading,
  subduction, mountain building, faulting,
  earthquakes, and volcanoes.
                    Review
• All of the concepts we have learned to this point
  are closely related to each other.
• These science concepts are like a puzzle: All of
  the “pieces” work together to make something
  bigger.
• The concepts are also an example of cause &
  effect. When one process occurs another
  process will occur in return.
What do all of these things have in
            common?
 •     They are all made of
 •     rock?
            Rocks
      Why are rocks important?
    Since the beginning of human
existence, we have depended on them.
     How did rock form on Earth?
• Not only do we rely on rock for tools and
  construction, but Earth’s crust, which supports
  human life, is made of solid rock.
• So, how did Earth’s crust form?
• The early Earth was originally a giant ball of
  magma & lava. As Earth cooled down, some of
  the magma & lava hardened to form Earth’s
  crust.
            HW Assignment
• Read Ch. 4 Section 1
• Answer the Review Questions (1-4) on page
  86.
  What are rock-forming minerals,
  and about how many are there?
• There are about 20 minerals that make up
  most of the earth’s crust.
   Why would a rock’s color be
 important when classifying rocks?
• A rocks color is an indication of the rock’s
  mineral composition.
Some rocks are smooth and shiny.
Others are rough and dull. What do
geologists call the look and feel of a
          rock’s surface?
• Texture
 What are the 3 major groups that
  geologists classify rocks into?
• 1. Igneous
• 2. Sedimentary
• 3. Metamorphic
             Igneous Rock
• Igneous rock- form
  from the cooling of
  magma or lava.
• Can form on or
  beneath Earth’s
  surface.
• igneous rock song -
  Google Video
Sedimentary Rock
        • Sediment- small,
          solid pieces of
          material that come
          from rocks or living
          things.
        • Most sedimentary
          rocks are formed
          through a series of
          processes.
     From Sediment to Rock
• Erosion- running water, wind, or ice
  loosen and carry away fragments of rock.
      From Sediment to Rock
• Deposition- the process by which
  sediment settles out of the water or wind
  carrying it.
     From Sediment to Rock
• Compaction- the process that presses
  sediments together.
     From Sediment to Rock
• Cementation- process by which
  sediments are glued together and
  hardened.
                   Metamorphic Rock
• Metamorphic rock- created when heat
  and pressure deep beneath Earth’s
  surface change any rock into metamorphic
  rock.
•   HowStuffWorks Videos "Basics of Geology: Metamorphic Rock"
          Homework Options
• Complete the Ch. 5 Worksheet
• Write a poem or song about the 3 types of rocks.
    (Must tell what the three types of rock are and
    how they are formed. Poem or song must be
    appropriate and make sense.)
• Illustrate one of each of the types of rock and
    write a short paragraph describing what they are
    and how they formed.
(Illustrations must be detailed, match the shape,
    color and features of the rocks.)

								
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