Question

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what is true about the modified mercalli scale?

it is used to measure earthquake energy.
it is used to measure earthquake intensity.
it uses roman numerals on the scale.

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Explanation:

The Modified Mercalli scale uses Roman numerals (I - XII) to measure earthquake intensity (the effects of an earthquake on people, buildings, and the natural environment). It does not measure earthquake energy (that's the Richter or moment - magnitude scale).

Answer:

It uses Roman numerals on the scale. It is used to measure earthquake intensity.