Volcanoes Flashcards
1
Q
volcanoes
A
a vent of fissure in the Earth’s surface through which magma and gases are expelled
2
Q
magma chamber
A
the body of molten rock that feeds a volcano
3
Q
vent
A
an opening at the surface of Earth through which volcanic material passes
4
Q
crater
A
a funnel-shaped pit near the top of the central vent of a volcano
5
Q
caldera
A
a large, semi circular depression that forms when the magma chamber empties and causes the ground to sink
6
Q
lava plateau
A
a wide, flat landform that results from repeated nonexplosive eruptions of lava that spreads over a large area
7
Q
rift zone
A
an area of deep cracks that forms between two tectonic plates that are pulling away form each other
8
Q
hot spot
A
a volcanically active area of Earth’s surface far from a tectonic plate boundary
