1.3 Classes of fire

• Causes of fire, and classes of fire
• Fire triangle and fire control: breaking the fire triangle and use of fire extinguishers
• Dangers of fires

• identify causes of fire in nature
• explain the role of the components of the fire triangle in the spread of fire
• describe ways of controlling different classes of fires
• acknowledge the dangers of fires in nature

“What are the dangers of fire in nature?”

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1. What fire is
   40 min · 1 practice tasks · quiz
   Burning as a chemical change, what goes in, what comes out, and why it cannot be undone.
2. The fire triangle
   40 min · 1 practice tasks · quiz
   The three things every fire needs, and the single idea behind every way of putting one out.
3. Fuel: the first side
   40 min · 1 practice tasks · quiz
   What counts as a fuel, why liquids and gases catch fire more easily, and how to starve a fire.
4. Oxygen: the second side
   40 min · 1 practice tasks · quiz
   Where the oxygen comes from, what happens when it runs out, and how smothering works.
5. Heat: the third side
   40 min · 1 practice tasks · quiz
   What starts a fire, why some sources are easy to overlook, and how cooling puts one out.
6. How a fire spreads
   40 min · 1 practice tasks · quiz
   Four ways a fire reaches new fuel, including one that crosses an empty gap.
7. Natural causes of fire
   40 min · 1 practice tasks · quiz
   Fires that start with no person present, and what makes them more likely.
8. Human causes of fire
   40 min · 1 practice tasks · quiz
   The everyday activities that start most fires, and how nearly all of them can be prevented.
9. The classes of fire
   40 min · 1 practice tasks · quiz
   Why fires are grouped by what is burning, and what the five classes are.
10. Class A fires
    40 min · 1 practice tasks · quiz
    Burning solids, the class water was made for, and why cooling works so well on them.
11. Class B and Class C fires
    40 min · 1 practice tasks · quiz
    Burning liquids and burning gases: two classes where water is dangerous and the first move is different.
12. Class D and Class F fires
    40 min · 1 practice tasks · quiz
    Burning metals and burning cooking oil: two more classes made far worse by water.
13. Fires involving electricity
    40 min · 1 practice tasks · quiz
    Why the power must be switched off first, and which agents are safe once it is.
14. Breaking the fire triangle
    40 min · 1 practice tasks · quiz
    The three methods in full, matched to the classes, so you can work out what to use.
15. Types of fire extinguisher
    40 min · 1 practice tasks · quiz
    Five kinds, what each is for, and why the label colour is what you must read.
16. Using an extinguisher safely
    40 min · 1 practice tasks · quiz
    The four steps of PASS, and the six situations in which you should not fight the fire at all.
17. Fire in the kitchen
    40 min · 1 practice tasks · quiz
    The commonest place a serious fire starts at home, and exactly what to do about an oil fire.
18. The dangers of fire in nature
    40 min · 1 practice tasks · quiz
    What a wild fire destroys, why the damage outlasts the flames, and what it means for water supplies.
19. What to do in a fire
    40 min · 1 practice tasks · quiz
    The four actions in order, what to do if clothing catches fire, and how to move through smoke.
20. Making a fire safety poster
    40 min · 1 practice tasks · quiz
    The class project: designing a poster that people will actually read and act on.