tectonic plates
above the focus of an earthquake
epicenter
higher than a hill
mountain
Vent or fissure in the planet's crust
volcano
measure and record vibrations
Seismograph
shaking or trembling of the earth
Earthquake
The rocky skin of earth
Lithosphere
smaller section of lithosphere
tectonic plates
separate the tectonic plates
plate boundaries
greater than 20mil km²
Primary plates
less than 20mil km²
secondary plates
larger than secondary plates
primary plates
smaller than primary plates
secondary plates