A
Distance from Earth's surface to the center.
6,400 kilometers
The release of stored energy in the Earth's outer layer that causes vibrations is called
earthquake
Instrument that detects earthquake vibrations
seismographs
If rocks along a break move the break is called a
fault
The spot where the movement of an earthquake begins
Focus
Energy that is released during an earthquake
Vibrations
Vibrations that occur during an earthquake are called
seismic waves
The farther seismic waves travel, the ________ they become
weaker
The record made by a seismograph
seismogram
Three types of seismic waves are
Primary Waves
Secondary Waves
and
Surface waves
Slowest seismic waves are called
Surface waves
The four layers of the Earth are
Crust
________
Outer Core
Inner Core
Mantle
The crust is _________ under the continent than under the oceans
deeper
The crust is the ______ layer of the earth
top
The inner core is a _______ at the Earth's center
sphere
The ________ lays directly below the crust
mantle