*Changes of State

*States of Matter

*Ask as many questions as you can on the topic of state of matter:

*Solids*The particles in a solid are closely locked in position

and can only vibrate.

*Liquids*Compared to particles in a solid, the particles in a liquid

are more loosely connected and can collide with and move past one another.

*Gases*In gases, the atoms and molecules are free to move

independently, colliding frequently.

*PlasmaA plasma is an ionized gas.

A plasma is a very good conductor of electricity and is affected by magnetic fields. Plasma, like gases have an indefinite shape and an indefinite volume. Particles

The negatively charged electrons (yellow) are

freely streaming through the positively charged ions (blue).

*What happens to the molecules if you keep raising the temperature of a state?

*The molecules move faster and faster as you add energy until…………..

Molecules gain enough energy to change into the next state.

*Changes Between Solid and Liquid

*The change in state from a solid to a liquid is called melting.

*Changes Between Solid & Liquid*The change from a liquid to a solid is called freezing.

*Changes Between Liquid &Gas*The change from a liquid to a gas is called vaporization.

*Other Phase Changes

*Evaporation is the process that changes a substance form a liquid to a gas at room temperature.

*Condensation is the phase change in which a substance changes from gas to liquid.

*Sublimation is the phase change in which a substance goes from a solid to a gas.

*Deposition is the phase change in which a substance goes from a gas to a solid.

PHET states of matter

Lesson 4 states-of-matter_en.jar