Question

3. A seismograph is an instrument used to measure
the intensity of:
b. an earthquake
c. a volcano
d. a waterfall
a. wind​

Answer 1

Answer:

correct option is ,an earthquake.

Answer 2

[ (b) An Earthquake ]

Seismograph is an instrument that is used to measure the intensity of an earthquake . Many times its even used to predict earthquakes .

Seismograph includes a series of sheets that have continuous movements of tectonic plates recorded and in same way it graphs the waves . Any anomalies can be considered as the indications of earthquakes .

|| ★ || Supplementary information || ★ ||

• An earthquake may occur due to the following reasons :

1. Tectonic plates drifting
2. Tectonic plates colliding
3. Tectonic plates submerging

• The main area where earthquake occurs is called as focus and area directly above it is epicenter .

• Earthquake many times causes tsunamis and leave catastrophic effects .