Passive headspace extraction is one of the popular techniques for collecting samples of potential accelerants from a fire scene. Put the steps of passive headspace extraction in the correct order, starting with the collection of material at the crime scene. Using the arrows, move the numbers in the left column up or down to place them in the correct order from top to bottom. (Example: If item "d" is the first in order, it will go in the top box.)

1. container is heated in the lab
2. charcoal strip is removed and analyzed in a GC/MS
3. vapors are absorbed by the charcoal
4. a charcoal strip is hung inside the evidence container
5. liquids inside container evaporate
6. liquids condense on debris
7. container is cooled