Physical and Chemical Properties and Changes

Physical Properties Any characteristic of a material that can be observed or measured with out changing the composition of that substance.

Physical Change Changes that occur when some of the properties of a material change, but the substances in the material remain the same.

Separating Mixtures using Physical Properties.

Direct Separation Separation based on large physical properties like size, shape, color, magnetism, and density.

Filtration A process that separates mixtures based on the size of the PARTICLES.

Evaporation The process that separates mixtures based on their boiling point.

Distillation The process that separates substances in a mixture (solution) using their BOILING POINTS and allows you to collect BOTH substances.

Chromatography A process used to separate PIGMENTS.

Chemical Properties The way a substance reacts with other substances to form new substances with different properties.

Reactivity The property that describes how easily a substance combines chemically with other substances.

Flammability The ability of a material to burn in the presence of oxygen.

Chemical Changes A change that occurs when a substance reacts and forms one or more new substances.

Common signs of a chemical change 1. Change in color

2. Production of a gas

3. Formation of a precipitate

Chemical or physical change? Breaking glass Burning toast Copper penny oxidizing Butter melting Puddle evaporating Grinding coffee beans Nail rusting