Physical Property: Describes a substance’s appearance.

Chemical Property: Describes how matter reacts to change into other chemically different substances.

Clues that a Chemical Change has taken place:•Formation of a gas•Formation of a precipitate (solid)• Temperature change (energy)• A change in color

Color Change & Solid Forming

Gas Forming

Temperature Change

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Concrete

Heterogeneous mixture

SaltwaterHomogeneous mixture

Soil

Heterogeneous mixture

Neon Element

SugarSucrose C12H22011

Compound

Write the type of matter for each:• Sweat from a football player’s armpit

(answer: homogenous mixture – salt and water mixes evenly)

• Hydrogen peroxide that you put on oozing cuts (ans: compound)

• Vanadium (it’s on the periodic table) (ans: element – if its on the periodic table…)

• Vomit with chunks of your dinner in it (ans: heterogeneous – not an even mix)

What’s different?What’s the same?• Color• Density• Ductility• Malleability• Conducts

Electricity• Odor

• Mass• Length• Volume

Intensive Extensive