Plate Tectonics Day 4

• Just for fun Scrat and Continental Drift-Ice Age 4

• Pangaea’s Moving Farther Apart Again Song

• The Continental Drift Song (Breaking Up Is Hard to Do)

Who proposed the theory of Continental Drift?

Answer IS...(click here)

Let’s Review

What is the process which causes the plates to move?

Convection!

Convergent BoundariesPush together

Do the convergent Kung Fu Panda move put your palms together and rise. What is formed? Sometimes one plate slips under the other in subduction. Do this move with your hands.

BRAIN BREAK

Plates pull apart.

Divergent Boundaries

Put your hands over your head and pull apart.

Effects of crustal plate movement!

Faults are breaks in the Earth’s crust where rocks have slipped past each other.

Boundary between two plates that are sliding past each otherEARTHQUAKES occur along faults

Transform Fault Boundaries

Slide Sideways

two plates grind together past each other often causing earthquakes.

Ex. San Andreas Fault (California)

Slide Sideways

http://www.classzone.com/books/earth_science/terc/content/visualizations/es0804/es0804page01.cfm?chapter_no=visualization

San Andreas Fault in California

Mrs. Burns used to live a few miles from the San Andreas fault. Her husband looked at it out his office window at work. Palm trees grow along the fault line. This picture is taken from high up in space.

Click the pic

Make Your Own Earthquake

Snap your fingers and observe what is happening.

When you snap your fingers, imagine that each finger is a big chunk of rock deep inside the Earth’s surface. Like your fingers, one rock mass is forced against another.

Earthquake Destruction-click

Writing Reflection (in notebook):

Why do earthquakes in other countries seem to cause more damage and casualties than earthquakes in the US? What can Americans do about it?

Rain to write to

Where do earthquakes occur?

What happens when you throw a rock into water? Why does it ripple? How far do the ripples continue? How might this relate to Earthquakes?

An instrument called a seismograph records tectonic plate movement.

A seismologist is a scientist that studies earthquakes.

VIBRATIONS

Aftershocks are smaller vibrations after a large earthquake

Organizi

ng Our

Thoughts

Transform Fault

Divergent Convergent