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10 Cards in this Set

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a huge circular crater, caused when a volcano collapses into the magma chamber below.
Caldera
the circular funnel-shaped opening in the top of a volcanic cone.
Crater
the pouring out of lava and gas on to the Earth's surface.
Eruption
The name given to the theory that the Earth's crust is made up of moving sections of "plates".
Plate tectonics
An enormous and very destructive sea wave cause by a submarine earthquake or volcanic eruption.
Tsunami
Small fragments of rock and lava blown out of a volcano during an eruption.
Ash
the area along the edges of the Pacific Ocean where many of the world's earthquakes and volcanoes occur.
Ring of Fire
a rapidly flowing hot cloud of gas and ash blown out of the mouth of a volcano.
Pyroclastic flow
molten rock poured out at the Earth's surface. It can be thick and sticky or runny.
Lava
The molten rock deep in the mantle and lower crust, from which igneous rocks are made.
Magma