Earthquake and Volcanoes

Small, steep volcano witha cone made of tephra

Magma that has reached the surface of Earth

Number based on seismic wave amplitude; the measurement of a Ritcher Scale

Underground center of an Earthquake

Structures that can withstand Earthquakes

Bits of rock or solidified lava dropped from air

Instrument used to record Earthquakes

Cone-shaped mountians that spew out lava or gas

Break in Earth's rocks caused by stress

long crack where plates diverge

large rising bodies of magma not at plate boundaries

Point on Earth's surface directly above the focus

Volcano formed by gentle eruptions of fluid lava

molton rock inside Earth

subduction takes place at a convergent boundary

tectonic plates are moved around by these currents

They are the slowest and largest of the seismic waves and cause most of the destrcution during an Earthquake

an avalanche of glowing rocks flowing on a cushion of hot gases

measures the magnitude of an Earthquake

It is divided into about 13 major plates

Vibrations that occur when rocks break due to stress

Siesmic sea wave