The continual random movement of microscopic particles suspended in liquid or gas is called what?
These particles move around because they are being what by the fluid they are in.
Particles move around faster in hotter or colder fluid.
The movement can be in any direction. This is why eventually particles spread ..?.. throughout liquids and gases.

Please make sure before you check answers, that spaces haven't been left before or after the words or it will mark them wrong.