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Chap. 6 volcanoes
Volcanoes ch.6
| Question | Answer |
|---|---|
| Magma | molten mixture of rock forming sub., gases and water deep in earths crust |
| Silica | The more of this that magma contains, the thicker the magma is |
| Pyroclastic flow | this happens when an explosive eruption hurls ash, cinders, bombs and gases out of a volcano |
| Shield | wide gently sloping mtn.made of hardened |
| Volcanic neck | This forms when magma hardens in a volcanoes pipe and later is exposed |
| Volcanoe | A weak spot in the crust where magma comes through |
| Pahoehoe and aa are produced during | Quite eruptions |
| Geysor | Hot water and steam that erupts from the ground |
| Batholith | mass of rock formedwhen a large body of magma colled inside earth's crust |
| Caldera | When the top of a volcanic mtn. collapses this forms |
| Hot spot | area where magma melts through the crust in the middle of a plate |
| Magma chamber | Inside a volcano, magma collects inside the pocket |
| potassium/ volcanic ash | soils are fertile because of this |
| Shield volcanoes | Layers of thin running lava that flow over a wide area before they cool and harden can build up. |
| active | volcanoes that show signs of eruption or future eruption |
Created by:
J.A
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