Change of State A change of state is a physical property because it does not change the chemical identity of the substance. It is a physical change of a substance from one state to another.

Common States of Matter Common states of matter are solids, liquids, gases, and plasma.

Solids Solids have:- Definite volume Definite shape Particles or molecules are packed closely in a fixed position Strong attractive forces between them. Vibrate, but do not move

Liquids Liquids have:- Definite volume Indefinite shape Particles are able to move past one another Particles move faster than those of a solid

Gases Gases have:- No definite volume No definite shape All bonds are broken Particles move freely and quickly No attractive force between them

Plasma Plasma, an ionized gas has:- Very high temperatures (1,000 to 1,000,000 oC) Lose most of their electrons Found in fluorescent bulbs

Examples of Plasma Flames Northern Lights Lightning The sun is an example of a star in the plasma state

Energy and Changes in Matter Energy in the form of heat or light is always needed for any type of change to take place

The Law of Conservation of Energy In a chemical change energy is neither created or destroyed, it is simply rearranged to form a new product.

Stop and Think Use the left side of your notebook to create a chart of the different states of matter. Include information about the shape, volume, particle movement, and attractive forces between the particles. Include a picture of the molecular structure of each phase.