forces in earth’s crust chapter 6 section 1. earthquakes elasticity is the ability for an object...
TRANSCRIPT
Earthquakes
• Elasticity is the ability for an object to return to or keep its original shape
Which is more elastic…
a bouncy ball or a bowling ball?
Earthquakes
• Tectonic movements supply the force that bend and stretch rocks
• When the elastic limit of rock is passed, it breaks and produces forces called earthquakes.
• 80% of all earthquakes occur along edges of the Pacific Plate (Ring of Fire)
Strike-Slip Fault
• Caused by shearing forces
• Occurs at transform boundaries
• Irregular surfaces snag each other
• Example: San Andreas Fault
Let’s Review
• What are the 3 kinds of faults?– Tension– Compression– Shearing
• What are the 3 kinds of forces that cause faults?• At what boundaries do they form?
– Normal– Reverse– Strike-slip
Divergent
Convergent
Transform