| A | B |
|---|
| fault | a crack or a fracture in Earth's lithosphere along which movement occurs |
| focus | a location inside Earth where rocks first move along a fault and from which seismic waves originate |
| aftershock | a smaller earthquake following the main shock of a large earthquake |
| seismicwave | energy that travels as vibrations on and in Earth |
| epicenter | the location on Earth's surface directly above an earthquake's focus |
| seismograph | an instrument that measures and records details of earthquakes such as force and duration |
| magnitude | the number that characterizes the relative size of an earthquake |
| vent | an opening in the earth's surface from whick volcanic material (lava, steam, gas) is emitted |
| sphere | a solid geometric figure generated by the revolution of a semicircle about its diameter (ball shape) |
| geosphere | the solid part of the earth |
| gravity | an attractive force that exists between all objects that have math |
| density | the mass per unit volume of a substance |
| crust | the brittle, rocky, outer layer of the earth |
| core | the dense, metallic center of Earth |
| asthenosphere | the partially melted portion of the mantle below the lithosphere |
| lithosophere | the rigid outermost layer of the Earth that includes the uppermost mantle & crust |
| magnetosphere | teh outer part of Earth's magnetic field that interacts with charged particles |
| mantle | the thick middle layer in teh solid part of Earth |
| landform | a topographic feature formed by processes that shape earth's surfaces |
| plain | landform with low relief (flat) and low elevation (it's low) |
| plateau | an area with low relief (flat) and high elevation (it's tall) |
| mountain | landform with high relief (rocky) and high elevation (it's tall) |
