Ameasure of the energy of motion of the particles in a substance is its

Particle motion increases as energy is added (like heat). The motion slows as energy leaves. Temperature is a measure of this change in particle motion.

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )

Iwould have to say sorry i can't elaborate more. hope this though!