Three States of Matter

Evaporate

happens when a substance changes from a gas to a liquid

Freezing Point

the temperature at which it changes from a liquid to a solid

Gas

A form of matter that does not have a definite volume or shape

The temperature of a substance does not change before the what is complete?

Change of state

Solid Carbon Dioxide

Dry ice - instead of melting into a liquid it goes through sublimation

Endothermic change

Energy is gained by the substance as it changes state (like melting)

The five changes of state

Melting, Freezing, Evaporation, Condensation, Sublimation

Describe the particles in solids

Particles are close together and vibrate in place.

Describe the particles in liquids

Particles are close together but can slide past one another

Describe the particles in gases

Particles of a gas are far apart and move independently of one another

condensation

The change of state from a gas to a liquid

Sublimation

The change of state from a solid to a gas

Surface tension

The force that acts on the surface of a liquid and that tends to minimize the area of the surface

Viscosity

The resistance of a gas or liquid to flow

Solid

The state of matter that has a definite volume and shape of a substance are fixed (which means it never changes)

Liquid

The state of matter that has definite volume but not a definite shape. Liquid takes the shape of the container its in

Melting Point

The temperature at which a substance changes from solid to liquid

change of state

When a substance changes from one physical form to another

Boiling point

at a given pressure, the condensation point for a substance is the same as this

Atmospheric pressure

decreases as you go higher above sea level and the temperature of a substance gets lower

exothermic change

energy is removed from the substance (like freezing)

Gallium

melts at 30 degrees celcius, not good for jewelry

What matter is made up of

molecules and atoms

The three most familiar states of matter

solid, liquid, gas

The speed of the particles in a substance changes when the what changes?

temperature

What happens if energy is added or removed from a glass of water

the ice cube will melt and when energy is removed the water will freeze