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volcano science test questions
| Term | Definition |
|---|---|
| ash | fragmented volcanic material with particles that measure less than 2mm in diameter |
| ash fall | the ejection of volcanic materials into the atmosphere and the settling of those materials over a wide area of the surface of the earth |
| crater | a small,bowl-like shape hole that forms when rock explodes from a volcano during an eruption |
| extrusive igneous rock | igneous rock formed by lava cooling on the surface of the earth |
| igneous rock | a solid earth material that forms when magma or lava cools and crystallizes on or below the earths surface |
| intrusive igneous rock | igneous rock that forms from magma cooling inside the earth |
| lava | magma that has reached the surface of the earth |
| magma | hot,molden rock inside the inside of the earth |
| pillow lava | balloon like mounds that form when lava flows under water or into the ocean |
| pyroclastic | made of hot fragments from volcanic material |
| viscosity | the tendency to resist flowing;a property of liquids |
| volcanologists | a scientist who studies volcanoes and volcanic phemonia |