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

Concrete Heterogeneous mixture

Saltwater Homogeneous mixture

Soil Heterogeneous mixture

Neon Element

Sugar Sucrose 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)

Intensive Extensive What’s the same? What’s different? Color Density Ductility Malleability Conducts Electricity Odor Mass Length Volume