A/n ___________  is a form of matter that has a constant composition (meaning that it is thesame everywhere).

A material composed of two or more substances is a/n _________.

Elements and compounds are both examples of ____________.

A substance that cannot be broken down into chemically simpler components is a/n _________.

Aluminum, which is used in soda cans, is a/n _________.

A substance that can be broken down into chemically simpler components (because it has more than one element) is a/n _________.

Water is a/n ________ composed of the elements hydrogen and oxygen.

Up to date, there are about ___ elements in the known universe.

Ordinary table salt, called sodium chloride, is considered a/n _________ because it has a uniform and definite composition.

A/n __________ mixture is a mixture in which the composition is uniform throughout the mixture.

A/n __________ mixture is a mixture in which the composition is not uniform throughout the mixture.

Vegetable soup is a/n _________ mixture because any given spoonful of soup will contain varying amounts of the different vegetables and other components of the soup.