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earthquake/volcanos
| Question | Answer |
|---|---|
| What is a volcano? | A weak spot in the Earth's crust where molten material, or magma , comes to the surface |
| Where do MOST volcanoes occur? | Along diverging plate boundaries |
| What is a hot spot? | An area where magma from deep within the mantle melts through the crust like a blow torch |
| What is the ring of fire? | A major volcano belt located on the rim of the Pacific ocean |
| How many active volcanoes are there on land, and are there more on land or under water? | There are about 600 active volcanoes on land, and there are many more underwater |
| What is lava? | Magma that has reached the surface |
| What is magma? | It is extremely hot, molten material that contains dissolved gases |
| What is a magma chamber? | As magma rises toward the surface , it forms a large underground pocket |
| What is lava flow? | A river of lava that pours down a volcano and over the land |
| What is the crater of a volcano? | It is where lava is collected in a bowl-shaped area that forms around the volcano's vent |
| What is a side vent in a volcano? | Sometimes magma forces its way out of the side of a volcano |
| What is a vent in a volcano? | The point on the surface where magma leaves the volcano |
| What is a pipe in a volcano? | A narrow, almost vertical crack in the crust that magma rises from |
| Why do earthquakes occur before and/or during a volcano? | Magma moving up the vent inside the volcano cause the rocks to move and shake producing seismic energy. |
| List the three types of seismic waves in order of speed, fastest to slowest. | P – S- L(surface) |
| What is an earthquake? | The shaking by the sudden release of energy |
| What are the three types of stress? | Shearing, compression, and tension |
| What is shearing? | Rocks to move in opposite directions |
| What is compression? | Rocks to push together |
| What is tension? | Rocks to pull apart |
| What is fault? | A break in the Earth's crust along which tectonics plates move in different directions and at different speeds |
| What is caused by shearing? | Strike-slip fault |
| What is caused by compression? | Reverse fault |
| What is caused by tension? | Normal fault |
| What is deformation? | the change in the shape of rock in response to stress |
| What is an anticline? | When rock bends upward |
| What is a syncline? | When rock bends downward |
Created by:
soccerforlife14
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