Take out your notebook

Look at the worksheet page you did after the test.

Check your answers with those on the next slide!!

Forces in the Earth’s crust answers

1. Reverse fault 2. Compression

3. Hanging wall moves up4. Normal fault

5. Tension6. Hanging wall moves down

7. Strike-slip fault8. Shearing

9. Blocks move sideways in opposite directions10. Stress that moves rock in two opposite

directions 11. A large area of flat land elevated high

above sea level

Write what is in yellow in a new page in your notebook.

Add it to your table of contents as “types of faults”

3 Types of Faults

Normal fault

Reverse fault

Strike-slip fault

Normal faults

A normal fault occurs when one plate slides down another plate.

Tension is the force causing the plates to move apart

Reverse Faults

Reverse faults occur when one plate slides up another plate.

The angle is steep usually greater than 45 degrees.

Compression is the force that causing the plates to push together

Compression causes Anticlines and Synclines

Anticlines are folds in which each half of the fold dips away from the crest.  Synclines are folds in which each half of the fold dips toward the trough of the fold.  You can remember the difference by noting that anticlines form an “A” shape, and synclines form the bottom of an “S.” 

Strike-slip Faults

Strike-slip faults occur when one plate slides either to the right or to the left of another plate.

Shearing is the force causing the plates to move past each other.

San Andreas Fault

It is more than 800 miles long and 10 miles deep!

It is an example of a strike-slip fault. Locked sections remain still for about

hundred years until there is enough force to move them. These sections result in massive earthquakes.

Sections that creep move slowly at a constant rate. They result in more subtle earthquakes.

Images of the SAF

The Future of CA

The Pacific Plate ismoving northwest of the North AmericanPlate. Eventually California will be further north.

I live in Louisiana…

Why do I need to know this?

Earthquake game http://www.youtube.com/watch?v=XVrM8dSAtu4

http://www.youtube.com/watch?v=1MFzcl-kZHo&feature=related dog earthquake

http://www.youtube.com/watch?v=QPaHJ4rAEtM fault explained

Fault Block Mountains http://videos.howstuffworks.com/hsw/6226-

mountain-building-fault-block-mountains-video.htm

  3 types of faults – animation   http://www.geolsoc.org.uk/gsl/education/roc

kcycle/page3573.html   Epicenter Focus http://science.howstuffworks.com/earthqua

ke4.htm  

SEISMOLOGY

THE STUDY OF EARTHQUAKES

THE SCIENCE DEALING WITH ALL EARTH MOVEMENTS AND WAVES

SEISMOLOGIST

THE SCIENTIST THAT STUDIES THE MOVEMENTS OF THE EARTH

A PERSON WHO STUDIES SEISMOLOGY MUST KNOW FACTS ABOUT GEOLOGY,

PHYSICS, AND CHEMISTRY

SEISMIC WAVES

CALLED EARTHQUAKE WAVES THERE ARE THREE TYPES OF SEISMIC

WAVES:› PRIMARY WAVES (P-WAVES)› SECONDARY WAVES (S-WAVES)› LONGITUDINAL SURFACE WAVES (L-WAVES)

SEISMOGRAPH

THE INSTRUMENT THAT MEASURES AND COLLECTS SEISMIC WAVES FOR EACH EARTHQUAKE.

IT SENDS THESE WAVE VIBRATIONS TO THE PRINTER MACHINE WHICH CREATES A GRAPH TO VIEW THE LOCATION OF THE SEISMIC WAVES

http://www.youtube.com/watch?v=VemVX6dQU_k seismograph

SEISMOGRAM

THE GRAPHED DRAWING OF THE EARTHQUAKE WAVES CAUGHT BY THE SEISMOGRAPH.

SHOWS THE LOCATIONS OF MANY DIFFERENT SEISMIC WAVES SO THAT SEISMOLOGIST CAN DETERMINE WHERE, ON EARTH, THE EARTHQUAKE OCCURRED.