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when the earth shake
| Term | Definition |
|---|---|
| fault | a fracture in bedrock along which blocks of rocks on opposite sides of the fracture move. |
| intensity | a measure of the damage done by an earthquake that is determined on the basis of the earthquake's effect on people structures and the natural environment. |
| magnitude | a measure of the total amount of energy released at the focus of an earthquake. |
| destructive | causing damage or injury. |
| stress | the amount of force being applied at a rock or surface. |
| tsunami | a series of sea waves caused by undersea events. |
| seismogram | the record made by a seismograph the paper on which data about earthquake waves is recorded. |
| siesmograph | an instrument used to detect earthquake waves. |
| tension | apply a force to something which tends to stretch it. |
| compression | the action of compressing or being compressed. |
| shearing | cut off (something such as hair, wool, or grass), with scissors or shears. |