Which statement describes the Mercalli scale?

Question

This scale measures seismic waves based on their size.
This scale rates an earthquake according to how much damage it causes.
This scale produces a single rating for earthquakes that reach the surface.
This scale measures the magnitude of an earthquake based on the size of seismic waves.

Answer 1

The statement that describes the Mercalli scale is: "This scale rates an earthquake according to how much damage it causes."

The Mercalli intensity scale measures the effects of an earthquake based on observations of the damage it causes and the human perception of the shaking, rather than measuring seismic waves directly.