Question

When the kinetic energy of particles in a substance decreases, what also decreases?

Answer 1

Kinetic energy means something in motion so if it decreases the speed of the object will decrease its speed or how fast its moving.

Answer 2

Temperature.

Step-by-step explanation:

The substance temperature decreases because the internal heat (that change temperature) is caused by the particles movement. The correlation is this: the more movement, higher temperature; the less movement, lower temperature.

So, decreasing kinetic energy will have a result with less movement, which implies lower temperature.