Test Review: Chemistry

A pure substance made of only one type of atom is

• a compound

• a mixture

• a solid

• an element

A type of mixture that is not evenly spread and is easier to separate:

• homogeneous

• heterogeneous

• solution

• compound

The two main classification categories of matter are

• elements and compounds

• mixtures and pure substances

• mixtures and solutions

• solids and liquids

Which of the following would be an element?

• barium

• salt

• air

• soil

A chemical formula represents the

• different parts of a mixture

• reactants and products in a reaction

• atoms and elements in a compound

• the law of conservation of mass

The small number to the bottom right of a symbol is the

• coefficent

• superscript

• exponent

• subscript

What creates a new substance by a chemical change?

• chemical reaction

• physical change

• heterogeneous mixture

• dissolving solution

Which of the following is NOT evidence of a chemical change or reaction?

• gas bubbles

• color change

• odor

• broken pieces

A ________mixture looks the same throughout.

• heterogeneous

• compound

• homogeneous

• exothermic

The picture above would be considered

• an element

• a mixture

• a compound

• a reaction