Class-VII-A

1

TOPIC FIRE friend and foe Class-VII

• By

LEKSHMI.N.NAIR T.G.T English, K.V. No 1, Naval
Base, Kochi.
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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.

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What are the three things needed to make a fire?
1. Fuel
3. Heat
2.Oxygen
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Uses of Fire

• Cook our food.
• Warm our homes in winter.
• Generate electricity.

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Three main ways to put out fire

• Take away the fuel.
• Prevent oxygen from reaching it.
• Remove the heat.

6
What is the best thing to fight an electric fire?

• CARBON DIOXIDE EXTINGUISHER

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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.

8
Match the following

• Lighted matchstick
• Air
• Coal
• Wood
• Burning coal
• Smouldering paper
• Cooking gas

1.Fuel 2.Oxygen 3. Heat
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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.