Class-VII Power Point Presentation

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Class-VIIPower Point Presentation

• HUKAM CHAND
• T.G.T ENGLISH
• K.V MATHURA CANTT

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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

• 1.Cook our food.
• 2.warm our homes in winter.
• 3.generate electricity.

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Three main ways in which fire can be put out

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

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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.

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Match the following

• A B
• 1.FUEL Lighted matchstick
• air
• 2.oxygen coal
• 3.heat burning coal
• wood
• smouldering
  paper
• cooking gas

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Rearrange the sentences in correct order

• 1.That is fire.
• 2.A chemical reaction takes place.
• 3.Energy in the form of heat and light is
  released.
• 4.Oxygen combines with carbon and hydrogen.