Review homework assignment. Have several students relate the fuels, heat sources and hazards they found in one of their assigned rooms. Comment on the hazards identified and the student's suggested remedies. 10 Minutes Explain that this lesson will be related mostly to fuel sources. 3 Minutes Explain why liquids are more dangerous than solids.
Vapors are the difference.
Can travel easily. Explain how gases are already vapors and fill any space they are in. Discuss how some vapors rise into the air and some sink down low. Minutes Begin demonstrations. Show how it is vapor and not liquid that burns.