Particles in motion and states of matter

To come together with direct impact

• contract

• collide

• thermal

• diffusion

To become smaller

• contract

• expand

• volume

• energy

The ability to cause change

• expand

• movement

• energy

• space

The amount of space something fills up

• expand

• volume

• small

• diffusion

Movement in all directions and at different speeds.

• area

• random motion

• collide

• expand

The movement of substances from an area of higher concentration to an area of lower concentration.

• expand

• motion

• diffusion

• thermal

Energy due to motion

• temperature

• Kinetic energy

• expand

• thermal

An increase in a material's volume when the temperature is increased.

• thermal contraction

• energy

• thermal expansion

• motion

A decrease in a material's volume when the temperature is decreased.

• collision

• thermal contraction

• kinetic energy

• thermal expansion

The energy of motion is called __________energy.