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An indicator of average kinetic energy is temperature. Temperature is directly proportional to the average kinetic energy of the molecules in a substance. If the degree of motion of the molecules inside an object doubles, the temperature will also double. Hope this answers the question.

Answer:

The word that goes into the blank is Temperature.

Explanation:

According to kinetic molecular theory, the average molecular kinetic energy is directly proportional to the temperature. we know that kinetic energy is directly proportional to the square of the speed of the molecule. hence kinetic energy is an indicator to temperature.

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