Chapter 8 Fire: Friend and Foe Important Questions Class 7 Honeycomb English
Short Answer Type Questions
Question 1. What was early man frightened of?
Answer
He was frightened of fire because it was powerful and dangerous.
Question 2. Why carbon dioxide is used to extinguish fire?
Answer
Because it does not allow oxygen to reach the burning material.
Question 3. What is known as fire brigades?
Answer
Bands of firefighting workers with special equipment is known as fire brigades.
Question 4. When should water not to be used on fire?
Answer
Water should not to be used on fire when it is caused by electrical appliances.
Question 5. What do you do to burn a piece of paper or wood?
Answer
We heat it before it catches fire.
Question 6. How water can also be dangerous to put on a fire?
Answer
If water is sprayed onto an oil fire, the oil would float to the lop of the water and would continue to burn thus, this can also be dangerous because water flows quickly, carrying the burning oil with it and would spread the fire.
Question 7. Why gaps are left between buildings during construction?
Answer
Gaps are left between buildings during construction to reduce the risk of fire.
Question 8. What is the second way of putting out a fire?
Answer
The second way is to stop oxygen from reaching it like small fires can be put out with a damp blanket or lack. If results to stop oxygen from Reaching any burning material. Again, carbon dioxide is also used to prevent fire.
Question 9. How fire is a good servant?
Answer
Fire is a good servant. When kept under control fire helps us do many things in most of our home we cook our food on fire. We use fire to keep us warm during extreme winter. It is also used to generating electricity.
Question 10. Write the demerits of fire?
Answer
As we know, fire can be dangerous if it goes out of control. Every year many homes and shops are damaged due to fire. The vast areas of forest are also destroyed and many people are killed and some are injured caused by fire.
Question 11. What do you understand by the ‘flash point’ of a fuel?
Answer
The temperature at which a fuel begins to burns is called its flash point.
Question 12. How oxygen is required to make fire?
Answer
Oxygen comes from the air and so when we blow on smoldering paper, it often bursts into flame thus, oxygen is also required to make fire.
Question 13. What is early man’s outlook for fire?
Answer
He was scared of fire. The early man might have seen volcanoes or lighting before he started using fire and was hence knew it was dangerous and powerful.
Question 14. What are the skills of firefighters?
Answer
Firefighters are highly trained people as they power many skills. They could cut off electricity supply and knock down dangerous walls. They spray water and other things to prevent fire under control firefighters are also trained in first aid as thug can help people who are injured or those who are suffering.
Question 15. Discuss the three way of putting out a fire?
Answer
The third way is to remove the heat. The fuel would stop burning, if the temperature can be brought down. Again, water is also sprayed on a fire, because it absorbs heat from the burning fuel and lowers the temperature.
Question 16. What is the role of fire fighter?
Answer
Fire fighters are given training on various skills to minimize the damage. They put out fire and also give first aid.
Question 17. Write some merits of fire.
Answer
Some merits like we use it for cooking our food, also warm our houses during winter season, and to generate electricity power.
Question 18. (i) What are some common uses of fire?
(ii) In what sense is it a “bad master”?
Answer
(i) The common uses of fire are to cook food, warm our names in winter, to generate electricity and many more.
(ii) If fire goes out of control, it can cause damage to our life, house and property. It is ‘bad master’ in this sense.
Question 19. What is called “flash point”?
Answer
Every fuel has a particular temperature at which it starts burning this temperature is called the “flash point”.
Extract Based Questions
Extract 1
He must have watched lightning and volcanoes long before he began to use fire himself. Fire was powerful and dangerous, and he was frightened. Fire may have puzzled early man but we now know that fire is the result of a 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.
Questions
(i) Who must have watched lightning?
(ii) Why was ‘he’ afraid of fire?
(iii) What is the chemical reaction in fire?
(iv) What is released from fire?
(v) Choose from the passage an adjective with the meaning ‘perplexed’.
Answer
(i) Early man must have watched lightning.
(ii) He was afraid of fire because it was powerful and dangerous.
(iii) When the oxygen in the air combines with carbon and hydrogen in a fuel, a chemical reaction takes place.
(iv) Energy is released in the form of heat and light.
(v) Puzzled.
Extract 2
It is sometimes said that fire is a good servant but a bad master. It only means that fire is very useful as long as it is kept under control. For instance, we use it to cook our food, warm our homes in winter and to generate electricity. But, on the other hand, if fire gets out of control it can be very dangerous. Each year thousands of homes and shops are damaged by fire. Vast areas of forest are also destroyed and hundreds of people are killed or injured.
(i) Who is called as ‘a bad master’?
(ii) Where do we use fire?
(iii) Why are the forest destroyed?
(iv) Give examples of fire as ‘a bad master’.
Answer
(i) Fire is called as ‘a bad master’.
(ii) It is used to cook food, warm homes in winters and to generate electricity.
(iii) According to the writer, the forest is destroyed by uncontrolled fire.
(iv) Every year thousands of homes and shops are damaged by fire. Human lives and forests are badly affected by its impacts of fire.
Extract 3
The third way of putting out a fire is to remove the heat. If the temperature can be brought down below the flash point, the fuel stops burning. You blow on a burning matchstick or a candle to put it out. In doing so, you remove the hot air around the flame bringing down its temperature below the flash point, and the candle goes out. Sometimes, water is sprayed on a fire. It absorbs heat from the burning fuel and lowers the temperature. The blanket of water also cut off the supply of oxygen, and the fire is extinguished.
(i) How can fire be put out?
(ii) When does the fuel stop burning?
(iii) What is the impact of water if sprayed on a fire?
(iv) How can fire is extinguished with \frater?
(v) Give the meaning of ‘extinguished’.
Answer
(i) Fire can be put out by removing the heat.
(ii) If Hie temperature can be brought down below the flash point the fuel stops burning.
(iii) It absorbs heat from the burning fuel and lower the temperature.
(iv) The blanket of water cuts off the supply of oxygen, and the fire is extinguished.
(v) Put out.
Extract 4
Long ago, there were no firemen. When fire broke out, everybody became a firefighter. People formed human chains (they still do if required) and passed buckets of water from a well or a pond to the blaze. Now there are laws about building construction which ensure that space is left between buildings to reduce the fire risk. Every new building, especially a public place, must ensure observance of fire prevention norms. Bands of fire fighting workers with special equipment, known as fire brigades, are there to put out fires. Firefighters are highly trained people. They possess many skills. They cut off electricity supply, knock down dangerous walls, spray water and other materials to bring fire under control.
(i) What happened in earlier times when fire broke out?
(ii) Why are the laws about building construction enforced?
(iii) What is a fire brigade?
(iv) What are the skills of fire fighters?
(v) Change verb ‘Prevent’ into a noun.
Answer
(i) When fire broke out, everybody became a fire – fighter by forming human chains.
(ii) There are laws about building construction to reduce the fire risks.
(iii) Fire brigade is a band of fire fighting workers with special equipment.
(iv) Fire fighters are highly trained people. They cut off electricity supply, knock down dangerous walls spray water and other materials to bring fire under control.
(v) Prevention.