Describe some of the ways in which drugs are packaged. Describe the difference between presumptive and confirmatory tests. Explain the use of color and crystal tests. Explain what happens to a...

Describe some of the ways in which drugs are packaged. Describe the difference between presumptive and confirmatory tests. Explain the use of color and crystal tests. Explain what happens to a combustible mixture above, within, and below the range of combustibility. List the three elements that must be present for a fire to burn.