Presentation on theme: " 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."— Presentation transcript:
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
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.
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
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.
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
Compression- happens when the crust is squeezed. Tension- happens when rock is pulled
Folding occurs when rock layers bend. 3 Types 1. anticline 2. syncline 3. monocline
If the conditions are right, rocks can break and slide. This is called a fault. SAVAGE EARTH Animations SAVAGE EARTH Animations
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.
Usually form at a convergent boundary where two continental plates collide. Crust is squeezed upward. http://education.sdsc.edu/optiputer/flash/indiaMove.htm http://education.sdsc.edu/optiputer/flash/indiaMove.htm http://www.cdli.ca/courses/geog3202/unit01_org01_ilo06/b_activity.html http://www.cdli.ca/courses/geog3202/unit01_org01_ilo06/b_activity.html
Form when a series of faults break/slip. Tension usually causes fault-block mountains to 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 http://www.pbs.org/wnet/savageearth/animations/volcanoes/index.html
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.
True or False: Earth’s tectonic plates are always in motion.
Since Earth’s plates are always moving, what do you think the land looks like in the areas that two plates meet?
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.
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