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TOPIC FIRE : friend and foe Class-VII. By. LEKSHMI.N.NAIR T.G.T English, K.V. 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.

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  1. TOPIC FIRE: friend and foe Class-VII By LEKSHMI.N.NAIR T.G.T English, K.V. No 1, Naval Base, Kochi.

  2. 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.

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

  4. Uses of Fire • Cook our food. • Warm our homes in winter. • Generate electricity.

  5. 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

  7. 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

  9. 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.

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