Observe the 3 mountain ranges below. Write a description of each mountain and predict how they might have formed.

1
Welcome to Science 9/26

• Observe the 3 mountain ranges below. Write a
  description of each mountain and predict how they
  might have formed.
• Todays Schedule
• 1. Ch. 7 Section 4 Notes/Discussion
• 2. Mountain Assignment

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CH. 7 Section 4 Deforming Earth's Crust

• Have you ever been stressed out about something?
• The Earth also gets stressed out.
• Today our objective is to discover how the Earth
  reacts when it gets stressed.
• Open you books to page 181.

3
Welcome to Science 9/27

• Pick up a slip of paper with two mountain ranges
  on it from the cup on the cart at the front of
  the room. Also have your paper out from
  yesterday.
• Todays Schedule
• 1. Question of the Day
• 2. Conclude discussion over Section 4
• 3. Begin Mountain Range Assignment

4
Question of the Day

• The Himalayas are the highest mountains on Earth.
  They lie between India and China. The Himalayas
  are getting about 5mm higher each year. Which
  statement correctly describes the constructive
  and destructive forces affecting the Himalayas?
• A. Weathering erosion forces are not affecting
  the Himalayas.
• B. Weathering erosion are happening at a
  greater rate than mountain-building forces.
• C. Weathering erosion are happening at a lesser
  rate than mountain-building forces.
• D. Weathering erosion are happening at the same
  rate as mountain-building forces.

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What is Stress?

• Stress is the amount of force put onto an object.
• Depending on the conditions, rocks will behave
  differently when under stress.
• How do you think stress affects Earths crust?
• Bend/fold
• Break/snap

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Types of Stress

• Compression- happens when the crust is squeezed.
• Tension- happens when rock is pulled

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Folding

• Folding occurs when rock layers bend.
• 3 Types
• 1. anticline
• 2. syncline
• 3. monocline

8
Faulting

• If the conditions are right, rocks can break and
  slide. This is called a fault.
• SAVAGE EARTH Animations

9
Mountain Building

• Over time the small folds and faults that stress
  the Earths crust can build into giant mountains
  like Mount Everest.
• Your goal now is to learn more about how the
  different types of stress can lead to the
  formation of mountain ranges.

10
Welcometo Science 9-29

• Todays Schedule
• 1. Conclude Ch. 7 Section 4
• 2. Introduce Ch. 8
• 3. Start Assignment

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HOW DO FOLDED MOUNTAINS FORM?

• Usually form at a convergent boundary where two
  continental plates collide.
• Crust is squeezed upward.
• http//education.sdsc.edu/optiputer/flash/indiaMov
  e.htm
• http//www.cdli.ca/courses/geog3202/unit01_org01_i
  lo06/b_activity.html

12
HOW DO FAULT BLOCK MOUNTAINS FORM?

• Form when a series of faults break/slip.
• Tension usually causes fault-block mountains to
  form.

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HOW DO VOLCANIC MOUNTAINS FORM?

• Form from lava layers that build up after each
  eruption.
• Only mountains to form from new crust.
• http//www.pbs.org/wnet/savageearth/animations/vol
  canoes/index.html

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MOUNTAIN RANGE ASSIGNMENT

• OBJECTIVE Identify how two different mountain
  ranges form.
• Fill in the table completely.
• On the map, locate where your two ranges are with
  the symbol for mountains and draw in the plate
  boundaries that played a role in making your
  mountains.
• Bonus Accurately draw in all of Earths major
  plate boundaries.

15
Question of the Day

• True or False Earths tectonic plates are always
  in motion.

16
All Stressed Out Lab

• Since Earths plates are always moving, what do
  you think the land looks like in the areas that
  two plates meet?

17
All Stressed Out Lab

• Land near plate boundaries is constantly pulled,
  pushed, folded and rearranged. The San Andreas
  fault in CA is one of the most jagged and rugged
  areas in the world because it is constantly being
  shifted and uplifted by plate movement.

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All Stressed Out Lab

• In this lab you will research the types of
  landforms created near plate boundaries.
• You will construct these landforms using modeling
  clay.
• Everyone in the group will participate in the lab
  and create their own models.
• Materials you will need Textbook, clay,
  toothpicks, and lab sheet.
• Follow the Procedure and Ask Questions