Do Now: 1) Take out candy bar lab from last night
2) List how many ways there are to change a
chicken. (You can physically change the chicken
AND chemically change the chicken.)
Tonight’s HW: Physical and Chemical
Changes Ditto
Physical and Chemical
Properties Page 6
• Highlight the following on page 6
– A Physical property is a characteristic of matter that
can be identified without changing the chemical
nature of the substance.
– Examples: State of matter, color, density, texture,
odor
– A chemical property is a characteristic of matter that
can only be identified by changing the chemical
nature of the matter. They are only observable during
a chemical reaction.
– Examples: Flammability, oxidation, toxicity, light
sensitivity
Physical and Chemical Changes
(p. 8)
• Physical changes: the change does not
produce a new substance.
– Digestion, burning, rusting, cooking
• A chemical change: a change in matter
that results in a totally new substance
– Examples: Melting, freezing, cutting, bending,
dissolving
A man standing in an Australian lake that has BIOLUMINESCENT algae
Chemical and Physical Changes
Demos!!
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Potassium permanganate
Glycerine
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Review Answers
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Boiling water
Dissolving sugar
Lighting a match
Rusting Nails
Melting Ice cream
Cooking steak
Tearing clothes
Sawing wood
Cutting paper
Physical
Physical
Chemical
Chemical
Physical
Chemical
Physical
Physical
Physical
More Chemical Changes!!
http://www.middleschoolchemistry.com/multimedia/chapter6/lesson7
http://www.middleschoolchemistry.com/multimedia/chapter4/lesson3