In simple terms a seismograph works with a pen attached to a heavy weight hanging near the ground. As the ground shakes the line being drawn by the pen wiggles to reveal how strong the earthquake is.
A seismograph is the device that scientists use to measure earthquakes. The goal of a seismograph is to accurately record the motion of the ground during a quake
Seismograph showed 7.0 on the scale. It is an instruments for measuring earthquakes.
The seismograph needle fluttered wildly during the aftershock.
A seismograph is the device that scientists use to measure earthquakes. The goal of a seismograph is to accurately record the motion of the ground during a quake
Since a seismograph is a device used to measure the magnitude earthquakes, someone who studies earthquakes would use it.
They use a seismograph
The seismograph measured the intensity of the seismic waves
Lilly, who is a scientist, used a seismograph to determine the strength of the earthquake that had just hit Haiti.
Use a seismograph.
Use a Seismograph.
seismogram and seismograph!
A seismograph.