Unit One: Vocab, Atoms, and Matter

Front

Atoms: basic building block of all matter, cannot normally be divided into smaller parts.

Back

basic building block of all matter, cannot normally be divided into smaller parts.

Front

Elements:

Back

A pure substance made of a single type of atom; all known elements are on the periodic table.

Front

Molecules

Back

Combination of atoms, smallest unit of a substance with all its properties.

Front

Compounds:

Back

A molecule made of two or more different elements.

Front

Mixtures:

Back

Two or more substances mixed; composition unchanged; separable physically.

Front

Chemical Reaction

Back

Reactants combine to form a new product; indications include temperature change, color change, and bubble formation.

Front

Physical Change

Back

A change that does not create a new product; only alters physical characteristics of a substance; usually reversible.

Front

Conservation of Matter

Back

Matter cannot be created or destroyed during physical or chemical changes; also known as Conservation of Mass.

Front

Thermal Energy

Back

Energy due to molecular movement; can be transferred; also called heat energy.

Front

Radiation

Back

Transfer of heat without contact.