The average kinetic energy for a substance or object is directly proportional its temperature.

According to the statement, which answer best describes how a substance would be affected if its temperature increased?

• The substances average kinetic energy would decrease.

• The substance's average kinetic energy would increase.

• The substances mass would decrease.

• The substance's mass would increase.

The substance's average kinetic energy would increase.

According to the statement, if the temperature of a substance increases, its average kinetic energy would also increase. Therefore, the best answer would be: "The substance's average kinetic energy would increase."

According to the statement, the average kinetic energy of a substance is directly proportional to its temperature. Therefore, if the temperature of a substance increases, its average kinetic energy would also increase. This means that the correct answer is:

• The substance's average kinetic energy would increase.

To understand why this is the correct answer, it is important to understand the concept of kinetic energy and temperature. Kinetic energy is the energy of an object due to its motion. Temperature, on the other hand, is a measure of the average kinetic energy of the particles within a substance.

When the temperature of a substance increases, it means that the average kinetic energy of its particles is increasing. As a result, the overall average kinetic energy of the substance also increases. This is because an increase in temperature causes the individual particles to move faster and have more energy.

Therefore, if you understand the relationship between kinetic energy and temperature, you can determine that an increase in temperature would cause an increase in the substance's average kinetic energy.