Physical
Vs.
Chemical
Notes # 3
Chemical
Properties
Any ability to produce a
change in the composition of
matter
Flammability
• A material’s ability to burn in the presence of
oxygen (O2)
Reactivity
• How a substance combines with other
substances
• Corrosiveness
Chemical Change
• A substance reacts and forms one or more
new substances
• Examples: cake baking, apple rotting,
food being digested
Signs of a chemical change
• Change in color
• Production of a gas
• Formation of a precipitate
• Production of heat or cold
Signs of a chemical change
• Fizzing and foaming
• Sound or light given off
• Change in odor
Physical Change
• Some of the properties change but the
substances stay the same
Some physical changes can be reversed,
some cannot
• Examples: butter melting, slicing a
tomato, getting your hair cut, melting ice
Chemical change vs. Physical
change
• Chemical change: the type of matter that
makes up the object and the way that the
matter is arranged in the object changes
• Physical change: the composition remains
the same