Page 3

States of Matter Project

A solid in which particles are not arranged in a regular, repeating pattern that often is formed when molten material cools too quickly to form crystals.

These lava rocks are a form of amorphous solid because the lava cooled too quickly to allow crystals to form.

Sublimation

The energy-requiring process by which a solid changes directly to a gas without first becoming a liquid.

When you apply water to dry ice it turns into a gas without first becoming a liquid.

Melting Point

For a crystalline solid, the temperature at which the forces holding a crystal lattice together are broken and it becomes a liquid.

As the temperature rises, ice begins to melt becoming a liquid.

The temperature at which a liquid is converted into a crystalline solid.

As water reaches the freezing point, it becomes a solid in the form of ice.

The smallest arrangement of connected points that can be repeated in three directions to form a crystal lattice.

The unit cell is the regular repeating pattern of particles (ions, atoms, and molecules) that spreads throughout the crystal lattice

The energy releasing process by which a gas or vapor becomes a liquid.

Condensation on glass occurs when vapor molecules come in contact with a cold surface.

Deposition

The energy-releasing process by which a substance changes from a gas or vapor to a solid without first becoming a liquid.

Frost on the leaves forms when water vapor changes into ice crystals.