GEOLOGY

Detailed explanation-1: -A seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with “seismograph". Seismographs are instruments used to record the motion of the ground during an earthquake.

Detailed explanation-2: -A seismometer is an instrument that records the shaking of the Earth’s surface caused by seismic waves. The term seismograph usually refers to the combined seismometer and recording device.

Detailed explanation-3: -Detailed Solution. The correct answer is Earth Quake. A seismograph records the waves reaching the surface during an earthquake.

Detailed explanation-4: -The Richter scale is used to rate the magnitude of an earthquake, that is the amount of energy released during an earthquake. On the other hand, a seismograph is an instrument used to detect and record seismic waves.

Detailed explanation-5: -A seismometer is an instrument used to measure seismic (ground motion) activity caused by earthquakes, volcanic eruptions, the use of explosives or other forces.