Mr. F's Particle Theory Info.

THERMAL EXPANSION

Particle Theory

Matter: is anything that has mass and takes up space.

The Particle Theory

Matter is made up of tiny particles with spaces between them.

Particles are always moving.

The more energy they have, the faster they move.

Tiny particles are attracted to each other.

Solid:

Particles are close together and locked into a pattern.
They move back and forth slightly.
Attractive forces hold the particles together.

Liquid:

Particles are slightly farther apart.
The attractive forces are weaker.
Particles slide past one another.

Gas:

Particles are far apart.
The attractive force between particles is weakest.
The particles move in any direction.

	Solid	Liquid	Gas
Types of particle movement	Back -and-forth	Slide past each other	Move in any direction
Spaces between Particles	Close together	Wider	Far apart
Attraction between particles	Strong	Weak	Weakest

Particle
model for
water water
temp Particle
speed-o-meter
(measures the
average speed
of all the
particles) DESCRIPTION

-5^oC In a solid, the fundamental particles of which it is composed are bound together in a strong lattice. The individual particles vibrate in fixed positions with respect to one another.

+20^oC In a liquid, the fundamental particles of which it is composed are loosely bound and are free to move randomly about within the liquid. Occasionally some break free from the group (at the surface boundary) in a process know as evaporation.

+120^oC In a gas the fundamental particles are not bound and move freely throughout the medium. As with solids and liquids, the average speed of the particles is proportional to the temperature of the gas. Particle Theory Summary

Particle model for water	water temp	Particle speed-o-meter (measures the average speed of all the particles)	DESCRIPTION
	-5^oC		In a solid, the fundamental particles of which it is composed are bound together in a strong lattice. The individual particles vibrate in fixed positions with respect to one another.
	+20^oC		In a liquid, the fundamental particles of which it is composed are loosely bound and are free to move randomly about within the liquid. Occasionally some break free from the group (at the surface boundary) in a process know as evaporation.
	+120^oC		In a gas the fundamental particles are not bound and move freely throughout the medium. As with solids and liquids, the average speed of the particles is proportional to the temperature of the gas. Particle Theory Summary