Physical and Chemical Properties

Physical Properties Physical Properties are properties that you can observe or measure. Examples: Color Odor Density Melting and boiling point Mass

Two types of physical properties Intensive Physical Properties Properties that do NOT change with the amount of substance present Independent of the amount of matter Examples: Color Melting/boiling point Texture Density

Extensive physical properties Properties that depend on the amount of matter present Examples: Mass Volume Length

Chemical Properties How a substance reacts with another substance. Examples: Flammability Reactivity with acids Ability to rust

Physical and chemical changes Physical Change Change in appearance Same substance after the change Examples: Ice melting Water boiling Tearing paper Salt dissolving in water

Chemical change Forms a new substance with new properties Examples: Metal rusting Burning wood Explosion Baking a cake

Evidence of a chemical change Bubbling or smoke given off (gas)

Evidence of a chemical change Heat or light given off

Evidence of a chemical change Color change

Evidence of a chemical change Formation of a precipitate (solid)