Its particles are always in contact with one another, almost as close.

Matter exists in different forms.

Water exists in different forms on Earth

The particles in a solid :

The particles in a solid vibrate in place, moving back and forth

Solids can be classified as:

Liquids have:

Substances cannot be classified by their properties

Is an inward force, or pull among the molecules in a liquid

The resistance to flowing

It has particles that can move around one another

Has the same volume as its container

Kinetic energy is the energy in motion

Is the total kinetic and potential energy of all the particles in an object or substance.

Measure of the average kinetic energy of the particles in an object or substance.

Measures temperature

When melting occurs at a specific temperature

The temperature at which a substance changes from liquid to solid

The change in state from a liquid to a gas

The temperature at which a liquid boils.

Change in state from a gas to a liquid

Occurs when the surface particles of a solid gain enough energy that they form a gas