Multiple choice

Which instrument is used to measure the earth quake density?

  1. Seismograph

  2. Ammeter

  3. Tachometer

  4. Hectograph

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A seismograph records seismic waves produced by earthquakes. Note: it measures earthquake intensity/magnitude, not 'density' - the question has terminology issues.