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
