Question

What is density? How does it affect the movement of particles of matter?

Answer 1

Explanation:

Density is the ratio of mass to the volume .

Answer 2

Answer:

Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.