Earthquakes
The study of earthquakes
seismology
Magma that bas reached the earth's surface is called
lava
Underwater mountain ridges
Mid oceanic ridge
The boundary between the earth's crust and mantle
Moho
The earth is divided into ______ layers.
Three
Earthquakes cause monstrous waves called
Tsunamis
A depression found at the top of a volcano is called
Trembling or shaking of the earth crust is called
Earthquake
Running along the edge of the Pacific Ocean, the ____________ is named for its many volcanoes
The Ring of Fire
The outermost layer of the earth is called?
Crust
A break that appears at the boundary between two moving masses of rock is called
fault
Holes or cracks which serve as escape vents for underground gases are called
Fumaroles
The process by which new soil is formed as rocks crumble and break into small pieces
Weathering
Formed from large amounts of very fluid lava that built up gradually
Shield Volcanoe
Makes up the largest portion of the earth
Mantle
The point underground where an earthquake begins
focus
Smaller fragments of molten rock that solidify almost instantly are called
tephra
What is it called when natural acid slowly eats away at rock
Chemical Weathering
Formed by eruptions of mostly lava and tephra
Cinder cone volcanoes
What is the innermost region of the earth? How many sections is it divided into?
Core
2
epicenter
A volcano is characterized by hot clouds of gas and dust that it expels
Plinian
What is created when trapped gases blast through the earth's surface
vent
formed by alternating layers of tephra and lava
Composite Volcanoes
The outer core is made out of?
The inner core is made out of?
Liquid
Metal