NCERT 5th Class (CBSE) Science: Safety and First Aid

Question: Name any three causes of fire.

Answer: The three causes of fire are:

1. Carelessness while handling burning match sticks, candles etc.
2. Electric faults
3. Gas leakage

Question: Why should we not operate any electrical switches when there is a gas leak?

Answer: We should not operate any electrical switches when there is a gas leak because the electrical switches generate sparks while being switched on and off.

Question: What should be done in case a person’s clothing catches fire?

Answer: In case a person’s clothing catches fire he or she should be rolled on the floor to control the flames quickly. Water can also be used to control the flames. A fire blanket may also be used but water is better.

Question: What is a fracture? what should be done in case of fracture?

Answer: A break or crack in a bone is called fracture. The fractured part should not be moved and the victim should be taken to the hospital immediately. For example: If the fracture is in the hand, a cloth sling should be used to prevent movement.

Question: How can fire hazards be prevented?

Answer: The ways to prevent fire hazards are:

1. We should be very careful while handling fire.
2. Electrical appliances and wiring should be check regularly for faults or breaks in the plastic coverings of the wires.
3. Synthetic clothes like nylon should not be worn while burning, handling fire or while cooking as synthetic clothes can catch fire easily.
4. In case of a gas leak, all the doors and windows should be opened. No one should strike a match or operate any electrical switches in such a case because electrical switches generate sparks while being switched on and off. faulty gas pipes should also be replaced.