A weak spot in the crust where molten material comes to the surface.
volcano
100
It is a a volcano that happens at a diverging plate boundary (mid-ocean ridge).
fissure or rift volcano
100
It is lava from a quiet eruption that looks like ropes coiled on the ground.
pahoehoe
100
It is heated groundwater in volcanic areas that rises to the surface.
hot springs
100
It is a major volcanic belt that is formed by the many volcanoes that rim the Pacific Ocean
Ring of Fire
200
A molten mixture of rock-forming substances, gases, and water from the mantle
magma
200
It is a string of islands formed by the volcanoes along a deep ocean trench (Aleutian Islands of Alaska, Japan , Philippines).
Island arc
200
It is lava from a quiet eruption that flows slowly and is rough and jagged
aa
200
It is heated groundwater that erupts from the ground due to pressure that builds up from the steam produced.
geyser
200
It is a mud flow from ice melting on the top of a volcano when it is going to erupt or from rain mixing with ash from past eruptions.
lahar
300
It is magma that has reached the surface.
lava
300
It is an area where magma from deep within the mantle melts through the crust like a blow torch (Hawaii and Yellowstone).
hot spot volcano
300
It is the area covered by lava as it pours out of a vent
lava flow
300
It is heated water in volcanic areas that can be used to heat homes or create electrical energy
geothermal energy
300
It is a large crater formed when a volcano collapses after an enormous eruption empties the main vent and magma chamber leaving the volcano hollow (They often fill with water to form large lakes.)
caldera
400
It is magma that collects in a pocket beneath a volcano.
magma chamber
400
It is a quiet volcano that erupts thin, runny lava. (Hawaii).
shield
400
It is a formation made when erosion wears away rock, exposing a magma chamber cooled and hardened into rock.
dome mountain
500
A long tube in the ground that connects the magma chamber to the Earth's surface.
pipe
500
It is an explosive volcano that erupts violently from thick, sticky lava
cinder cone
500
It is when moving magma deforms the ground setting off a series of earthquakes.