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Grade 7 earthquake project
Transcript of Grade 7 earthquake project
They are very devastating no matter where they are... In
Here This is where they
occur Landforms + affects. All of the areas seem to be very mountainous How/Why do they occur? -Earthquakes occur when two or more tetonic plates grind against each other while being driven by heat. Blocked by one an others movement, stress builds up. Finally the fault gives way and the energy runs through the earth in seismic waves. When someone is feeling an earthquake, they are actually feeling the seismic waves. ...So in other words, Earthquakes, also called tumblers, are very devastating and very deadly. On average 10'000 die of earthquakes each year.
They occur when masses of rock shift underneath our feet. The Danger? Truly, when it comes to earthquakes, we aren't really in danger.
Where we live, we are completely safe. (we might get the odd vibration once in a while) This is mainly because we live far from the edge of the plates that we live on. But, with this being said, we need to provide help to the places that are in danger, like Chile or Japan. The Richter scale. The "richter scale" is what scientists use to measure the magnatude of an earthquake. It ranges from 1-10. Basically, the greater it is on the richter scale, the more dangerous it is. Major
Destruction Moderate Threatening Not
noticeable Normal Alaska earthquake,
1964 The Great Alaska earthquake Richter scale The Alaska earthquake was the biggest recorded earthquake to ever hit North America. This earthquake hit southern Alaska and western Canada on March 11, 1964 and was a whopping 9.5 on the richtor scale! The damage was crazy big but the death toll was only 150-200 people for a magnitude this large. What was the damage toll exactly? In this devastating quake, there was 350-450 million dollars!
Most of the deaths in this situation were caused by the water. This quake caused many after shocks, landslides and tsunamis to come in to play! Bibliography http://earthquake.usgs.gov/earthquakes/world/events/1960_05_22.php http://environment.nationalgeographic.com/environment/natural-disasters/earthquake-profile/ http://video.nationalgeographic.com/video/environment/environment-natural-disasters/earthquakes/earthquake-101/ Bibliography pt.2 http://www.aeic.alaska.edu/quakes/Alaska_1964_earthquake.html Desrivieres,Dennis. Physical Geography.Pearson:Toronto Google images