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There's a whole lot of shaking going on

Huge blocks of rocks called platesHuge blocks of rocks that make up Earth's outer shell and fit together like a cracked egg. make up Earth's outer shell, or crust. These plates fit together like a cracked egg shell. The plates push and pull on each other constantly. Sometimes this pressure causes a faultA crack running through rock as the result of tectonic forces., or a break in the rocks. Large pieces of these rocks, called fault blocksPieces of rock from Earth's crust that press against each other and cause earthquakes when they suddenly shift or rupture from the pressure., can overlap. Pressure pushes on the rocks for centuries, finally causing them to rupture and snap in one big surge,...

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1. Introduction
2. There's a whole lot of shaking going on
3. Developing a theory
4. Measuring an earthquake
5. Experiment 1 - Detecting an Earthquake: How can movement of Earth's crust be measured?
6. Experiment 2 - Earthquake Simulation: Is the destruction greater at the epicenter?
7. Design Your Own Experiment