Chemistry Vocabulary: Part 2

Physical Properties Can be observed or measured without

changing the matter’s identity Adjective – descriptive word Examples

Color Smell Size/Shape Texture/Taste Temperature Density State (Solid, Liquid, Gas)

Chemical Properties Substance ability to participate in

chemical reactions Hard to observe In order to see these you must

change the substance into a new substance

Examples Flammability Reactivity

Characteristic Properties Chemical or physical property that

is always the same no matter what size the sample is

Can be physical or chemical Most useful type of property Examples

Density Flammability Reactivity Boiling Point, Melting Point, Freezing Point Color Smell

Physical Changes A change of matter from one form to

another without a change in chemical properties

Usually reversible, no change to matter composition

End with the same thing you started with Examples:

Ripping Crushing Cutting Heating Cooling Coloring All changes of state

Chemical Changes A change that occurs when one or more

substances change into entirely new substances with different properties

Never reversible End with something different than you

started with Examples:

Soured Milk Burning Digesting Cooking/Baking Rotting/Spoiling Tarnishing

Signs of a Chemical Change Change in color Change in temperature Fizzing/Foaming Sound or light being given off New smell New taste Precipitate – when two liquids are

mixed together and form a solid

EndothermicEnergy is absorbed by a

substance or substances

ExothermicEnergy is released from a

substance or substances