Question

Explain the construction and purpose of seismograph. [5 MARKS]

Answer 1

Explanation: 3 Marks
Diagram: 2 Marks

The seismic waves are recorded by an instrument called the seismograph. The instrument is simply a vibrating rod, or a pendulum, which starts vibrating when tremors occur. A pen is attached to the vibrating system. The pen records the seismic waves on a paper which moves under it. By studying these waves, scientists can construct a complete map of the earthquake. They can also estimate its power to cause destruction.