This is a collection of forty-nine multiple choice and matching questions dealing with scientific notation, the metric system, and density. The level of difficulty makes them appropriate for use in a college prep. course, a lab chemistry course, a physical science course, or general science course. The file comes with a copy of the test, the answer key, and a chart of metric prefixes defined as powers of ten and as decimal notation. The test is in Word format and can easily be altered to suit local needs.