click below
click below
Normal Size Small Size show me how
Volcano Terms
Terms related to volcanoes
Question | Answer |
---|---|
a process that occurs at divergent plate boundries | rifting |
is an instrument that detects earth's movements | seismometer |
a large circular depression, with a diameter of about 5 km lies within the vocano's summit | caldera |
those that form when explosive eruptions of sticky lava alternate with quieter eruptions of volcanic rock bits | composite-cone volcano |
melted rock, it is less dense than its other surrounding material | magma |
is made of layers of cinders | cinder-cone volcano |
is any opening in earth's crust through which hot gases, rocks, and melted material erupt | volcano |
forms when lava flows quietly from a crack in earth's crust | sheild volcano |
extremly hot places deep within earth's mantle | hotspot |
magma then rises and forms a chain of volcanoes | island arc |
magma that flows out onto earth's surface from a volcano, when magma researches earth's surface | lava |