Terms
The outermost layer of the earth
Crust
Any trembling or shaking of the earth's crust
Earthquake
Melted rock (underground)
Magma
Molten rock after it reaches the earth's surface
Lava
Core
An enormous wave that can be caused by an earthquake
Tsunami
An opening in the ground through which a volcano erupts
Vent
A vent that allows molten rock and hot gases to escape from within the earth
Volcano
The middle layer of the earth
Mantle
The break that appears at the boundary between two moving masses of rock
Fault
The smallest fragments of tephra; resembles dust or fine sand
Volcanic ash
A large reservoir located a few miles beneath the earth's surface containing magma
Magma chamber
The study of the earth and its structure
Geology
A scientist who studies the structure of the earth
Geologist
Fragments of volcanic rock that form when thick magma explodes into pieces as it leaves the volcano
Tephra
A zone of volcanoes that encircles the edge of the Pacific Ocean
Ring of Fire
The boundary between the crust and the mantle
Moho
The study of earthquakes
Seismology
Fragments of tephra that are smaller than bombs and blocks but larger than volcanic ash; means "little stones"
Lapilli
Holes or cracks that serve as escape vents for underground gases
Fumaroles