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Inside the earth
geography
| Term | Definition |
|---|---|
| tectonic plates | enormous moving pieces of the earths lithosphere. |
| plates | the crust is broken into different ... |
| plates | slowly drift atop a liquid mantal. |
| divergent | plates move apart, spreading horizontally. |
| convergent | plates collide, causing either one plate to dive under the other or the edges of both plates to crumble. |
| transform | plates slide past each other. create earthquakes and volcanoes. |
| volcano | a mountain with a crater through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earths crust. |
| lava | magma that has reached the earths surface. most volcanoes erupt with volcanic ash, which makes the area great for farming. |
| volcanic ash | what can create its own weather ? |
| narrow stream of hot mantle coming up from the mantle through the crust.. | creates chains of volcanoes as the plate moves across the hot spot (hawaiian islands, Galapagos Islands) |
| the ring of fire | the most active volcano and earthquake zone on earth. |
| earthquake | violent movement of the earth as the plates grind or slip past each other at a fault. |
| fault line | fracture in the earths crust where plates move past eachother. |
| hot spots | narrow stream of hot mantle coming up from the mantle through the crust. |
| tsunami | a giant wave in the ocean caused by an underwater earthquake. |
| seismograph | a devise that measures the size of the waves created by an earthquake |
| epicenter | point directly above the focus of an earthquake on the earths surface. |
| richter scale | uses information collected by seismographs to determine the strengh of an earthquake |