Post on 01-Jul-2015
Boom, Boom Earthquakes
By Danny and Moises
How earthquakes happen
• Sometimes it happens when a transform boundary occurs
• That is when two plates slide past each other
Earth’s plates
• Earth has 12 tectonic plates
• They have lots of force
• Forces are examples for stress• The Earth’s plates are like a candy bar
Types of stress
• There is a stress called tension
• Tension stretches rock
Stress
• There is one called compression
• Compression pushes rock’s together
More stress…
• Shearing is also a type of stress
• Shearing has the power to cause masses of rock to slip
Types of Faults
• One type of fault is a normal fault
Reverse fault
• There is one type of force it is a reverse fault
• It makes the hanging wall move up relative to the footwall
Strike-slip fault
• There is a fault called strike-slip fault
• Strike slip fault go past each other
Anticline, Syncline, and Plateau
• A anticline is an upward fold formed by compression
• Syncline is a downward fold in a rock• Plateau is a large area of flat land high
above above sea level
Natural Earthquakes happen by surprise
They can be really dangerous
The Natural Earthquake
Web sites
• http://static.howstuffworks.com/gif/12-of-the-most-destructive-earthquakes.jpghttp://www.windows.ucar.edu/earth/images/earth_plates_usgs_L.jpghttp://www.disastervideo.net/earthquake-car.php
http://phobos.ramapo.edu/~erainfor/SW04/07MCfault.JPGhttp://www.geography4kids.com/misc/photos/shearing.jpg
http://www.indiana.edu/~g103/G103/week9/revfault.jpg