| Term | Definition |
|---|
| deep-sea vents | hot springs that form at spreading centers in the ocean |
| geyser | a type of hot spring |
| fumarole | releases steam and other gases |
| acid rain | rain that contains large amounts of acid |
| sulfur dioxide | form acids when they mix with air |
| volcanic ash | heavy because it is made of tiny pieces of rock |
| mudflows | landslides that occur when loose rocks and soil are mixed with water |
| pyroclastic flow | rushes downhill; it can knock down or burn everything in its way |
| landslide | a rapid downhill movement of rock and soil |
| folded mountain | is a mountain that forms as continental crust crumples and bends into folds |
| fault block mountains | mountains that form as blocks of rock move up or down along normal faults |
| volcano | an opening in Earth's crust through which molten rock, rock fragments, and hot gases erupt |
| lava | magma that has reached Earth's surface |
| composite volcano | a cone-shaped volcano built up of layers of lava and layers of rock fragments |
| shield volcano | shaped like a broad flat dome |
| cinder cone volcano | has steep sides and is a loose pile of volcanic rock fragments |
| volcanic ash | made up of rock fragments less than 2 millimeters in diameter |
| cinders | contain holes and tunnels left by escaping gases |
| block | can be size of houses and erupt as solid pieces of rock |
| shield volcano | is built up of many thin layers of hardened lava |
| mountain | an area of land that rises steeply from the land around it |
| ranges | long lines of mountains that were formed at about the same time and by the same processes |
| mountain belts | ranges that are close together |
| Most of world's major mountain belts | located along tectonic plate boundaries |
| sediments | loose pieces that can be carried by water or wind |
| a mountain built up from erupted material | volcano |
| prefix 'pyro' | heat |
| clastic | made up of rock fragments |
| Ring of fire | belt formed by volcanoes around the Pacific Ocean |
| A volcano's shape | is determined by the type of magma feeding it |
| steam explosion | occur when magma comes near water or into contact with it |
Combine with other sets
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