1. which of the following is a direct cause of a substance’s temperature increase? (1 point). energy is removed from the particles of the substance.. kinetic energy is added to the particles of the substance.. the number of atoms and molecules in a substance changes.. the volume of the substance decreases.. 2. as the temperature of a substance increases, its volume tends to increase due to (1 point). thermal equilibrium.. thermal energy.. thermal expansion.. thermal contraction..

1. option b

2. option c

Explanation:

1. When temperature of a substance is increased, it is actually caused by the increase in the kinetic energy of the particles of the substance. The particles vibrate more rigorously. Average kinetic energy of a gas is proportional to temperature:

K.E. =0.5 kT²

thus, option b is correct.

2. As the temperature increases, the substance undergoes thermal expansion. Thus, the volume increases.

Option c is correct

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