# Observe the 3 mountain ranges below. Write a description of each mountain and predict how they might have formed. - PowerPoint PPT Presentation

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

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### Observe the 3 mountain ranges below. Write a description of each mountain and predict how they might have formed. Today s Schedule 1. Ch. 7 Section 4 Notes/Discussion – PowerPoint PPT presentation

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Title: 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

2
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.

5
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

6
Types of Stress
• Compression- happens when the crust is squeezed.
• Tension- happens when rock is pulled

7
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.
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

11
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.

13
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

14
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.

18
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