Question

what happens to the viscosity of a substance as energy (heat) increases? it stays the same. it stops completely. it gets lower. it gets higher.

Explanation:

Viscosity is a measure of a fluid's resistance to flow. When energy (heat) increases, the particles of the substance gain kinetic energy, move more freely, and the internal friction (which relates to viscosity) decreases. So the viscosity gets lower.

Answer:

It gets lower.