Faults. Schedule Vocabulary Intro.10-15 minutes Fault Notes/Activity15-20 minutes Vocabulary Game10-15 minutes Compare Contrast Homework10 minutes Exit.

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Presentation transcript:

Faults

Schedule Vocabulary Intro minutes Fault Notes/Activity15-20 minutes Vocabulary Game10-15 minutes Compare Contrast Homework10 minutes Exit Ticket5 minutes

Fault  A fracture, or break, in Earth’s lithosphere, where movement occurs.

Stress  A force that presses on, pulls on, or pushes against another object.

Earthquake  The ground shaking caused by the sudden movement of large blocks of rock around a fault.

Schedule Vocabulary Intro minutes Fault Notes/Activity15-20 minutes Vocabulary Game10-15 minutes Compare Contrast Homework10 minutes Exit Ticket5 minutes

What do you think caused this?

Rocks move along faults  Most faults are located along tectonic plate boundaries.  Very little movement actually happens during an earthquake.  Earthquake belt: 80% of earthquakes happen here  Around the Pacific Ocean  San Andreas fault  North American Plate & Pacific Plate come together  In California  Earthquakes occur in the lithosphere

San Andreas Fault

How Faults are Classified  3 types of faults  Normal fault  Reverse fault  Strike-slip fault  Faults are named based off of how rock moves

Normal Faults  Stress that pulls rocks apart is what causes this fault.  Tension forces  Footwall moves upward  Hanging wall moves downward

Reverse Faults  Caused by rock being pushed together  Compression forces  Footwall moves downward  Hanging wall moves upward

Strike-Slip Fault  Rocks move side by side  Caused by shearing forces

So how do we get an earthquake?  Pressure is applied to rocks  Rocks bend and stretch  Rocks exceed their elastic limit  Rocks break, causing an earthquake

Schedule Vocabulary Intro minutes Fault Notes/Activity15-20 minutes Vocabulary Game10-15 minutes Compare Contrast Homework10 minutes Exit Ticket5 minutes

Schedule Vocabulary Intro minutes Fault Notes/Activity15-20 minutes Vocabulary Game10-15 minutes Compare Contrast Homework 10 minutes Exit Ticket5 minutes

Schedule Vocabulary Intro minutes Fault Notes/Activity15-20 minutes Vocabulary Game10-15 minutes Compare Contrast Homework10 minutes Exit Ticket5 minutes