TOPIC
FIRE: friend and foe
Class-VII
LEKSHMI.N.NAIR
T.G.T English, K.V.By
No 1, Naval Base, Kochi.
WHAT IS A FIRE?
• FIRE is the result of chemical
reaction.
• When the oxygen in the air combines
with carbon and hydrogen in a fuel, a
chemical reaction takes place.
• Energy in the form of heat and light is
released in this process.
• This is what we call fire.
What are the three things needed
to make a fire?
1. Fuel
2.Oxygen
3. Heat
Uses of Fire
• Cook our food.
• Warm our homes in
winter.
• Generate electricity.
Three main ways to put out fire
• Take away the fuel.
• Prevent oxygen from
reaching it.
• Remove the heat.
What is the best thing to fight an
electric fire?
CARBON DIOXIDE EXTINGUISHER
FIRE FIGHTERS
• They are highly trained people.
• They cut off electricity supply.
• Knock down dangerous walls.
• Spray water and other materials
to bring fire under control.
Match the following
1.Fuel
2.Oxygen
3. Heat
•
•
•
•
•
•
•
Lighted matchstick
Air
Coal
Wood
Burning coal
Smouldering paper
Cooking gas
Rearrange the sentences in
correct order
• That is fire.
• A chemical reaction takes place.
• Energy in the form of heat and light is
released.
• Oxygen combines with carbon and
hydrogen.