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Stack #4609256
| Question | Answer |
|---|---|
| volcano | mountain that forms when melted rock (lava) comes out and hardens |
| seismic activity | the shaking of the earth’s crust due to an earthquake |
| Pacific Ring of Fire | an area around the Pacific Ocean where many earthquakes and volcanoes occur |
| Earthquake | the sudden shaking of the ground when energy is released along a crack in Earth’s crust |
| Focus | the location inside the Earth where an earthquake starts |
| epicenter | the place on Earth’s surface right above where an earthquake starts; it often shakes the most |
| seismic wave | energy waves that move through the ground during an earthquake |
| seismograph | tool that records earthquake waves |
| magnitude | how strong an earthquake is |
| fault | a crack in Earth’s crust |
| pyroclastic flow | fast-moving clouds of very hot gas, ash, and rock that race down the sides of a volcano |
| acid rain | rain that has a low pH because of certain chemicals in the air |
| dormant | a volcano that is not erupting |
| aftershock | smaller earthquakes that happen after a big earthquake |
| tsunami | a series of huge ocean waves that can be caused by an earthquake on the ocean floor |
| landslide | when a large amount of dirt and rock move quickly down a hill or mountain |