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Welcome to Science 9/26

Welcome to Science 9/26. 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 2. Mountain Assignment. CH. 7 Section 4 Deforming Earth's Crust.

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Welcome to Science 9/26

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  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. • Today’s 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. • Today’s 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 Earth’s 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 Earth’s 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 • Today’s 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/indiaMove.htm • http://www.cdli.ca/courses/geog3202/unit01_org01_ilo06/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/volcanoes/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 Earth’s major plate boundaries.

  15. Question of the Day • True or False: Earth’s tectonic plates are always in motion.

  16. All Stressed Out Lab • Since Earth’s 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

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