Q6 of 18 Page 119

Why does a burning candle go out when you blow on it?

When a burning candle is blown out the hot air around it is removed and its temperature is brought down below the flash point. Hence, the candle goes out as there is no appropriate amount of heat which is required to keep the candle burning.


More from this chapter

All 18 →
4

What are the three main ways in which a fire can be controlled or put out?

 5

Match the items in Box A with those in Box B :

Box - A


(i) To burn paper or a piece of wood


(ii) Small fires can be put out


(iii) When water is spread on fire,


(iv) A carbon dioxide extinguisher is the best thing


(v) Space left between buildings


Box - B


● It absorbs heat from the burning material and Lowers the temperature


● Reduces the risk of fire.


● With a damp blanket.


● We heat it before it catches fire.


● To put out an electrical fire.

 7

Spraying water is not a good way of putting out an oil fire or an electrical fire? Why not?

 8

What are some of the things you should do to prevent a fire at home and in the school?