Table for Individual Question FeedbackPoints Earned:1.0/1.0Correct Answer(s):B8.When discussing earthquakes that happen in the upper part of the Earth’s crust, geologists believe that most are caused by elastic rebound. This means:A) Rocks taken down into the Earth by subduction are squeezed until they implode, and then B) The Speaker of the House wears support hose.C) Rocks on opposite sides of a break, or fault, move in opposite directions, get stuck against D) Rocks on opposite sides of a break, or fault, move in opposite directions, and move freely E) Rocks on opposite sides of a break, or fault, move in the same direction at the same Feedback: Try sliding a boulder over the ground, and you’ll find the boulder gets stuck for a while. Lean harder, the boulder jerks forward suddenly, and you just had a tiny earthquake. Implosion earthquakes probably exist, but the rocks don’t bounce back to their original size, and they elastically rebound to their former size, shaking their surroundings.each other for a while, bend, then “snap back” when something breaks or gives along the fault.all the time because high-pressure groundwater lubricates motion.speed.
such quakes only can happen deep. We have no information on Graham Spanier’s choice in socks, but his choice is unlikely to shake much beyond the immediate vicinity of University Park.Table for Individual Question FeedbackPoints Earned:1.0/1.0Correct Answer(s):C9.On the Richter scale of earthquake intensity:Table for Individual Question FeedbackPoints Earned:0.0/1.0Correct Answer(s):A10.Bigger earthquakes occur less frequently, but a bigger quake releases more energy and does more damage. An interesting question to ask about earthquakes (and about almost anything else!) is whether the increase in energy release and damage done is larger or smaller than the decrease in frequency as one looks at bigger earthquakes. Asked a different way, is most of the damage done by the many little earthquakes or by the few big earthquakes?
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- Earthquakes, Correct Answer, Volcano, Death Valley