Class 7th English Chapter 8 Question Answer

NCERT Solutions for Class 7 English – Chapter 8 Fire: Friend and Foe

Class 7th English Chapter 8 Question Answer

NCERT Solutions for Class 7 English – Chapter 8 Fire: Friend and Foe
Class 7th English Chapter 8 Question Answer

Easy-to-understand answers for kids and students for class 7th.

Comprehension Check

Question 1:

Mark the correct answer in each of the following.
1. Early man was frightened of
(a)
lightning and volcanoes.

   (b) the damage caused by them.
   (c) fire.                                                          (C)

2. What is Fire?
(a)
 Fire is energy.

    (b) Fire is heat and light.
    (c) Fire is the result of a chemical reaction.    (C)

Question 2:

From the boxes given below choose the one with the correct order of the following sentences.
(i) That is fire.
(ii) A chemical reaction takes place.
(iii) Energy in the form of heat and light is released. .
(iv) Oxygen combines with carbon and hydrogen.

(i)
 (ii) (iii) (iv)               (ii) (iii) (i) (iv)

(iii) (iii) (ii) (i)                (iv)  (ii) (iii) (i)

Solution:
(iv) (ii) (iii) (i)

Working with the Text

Answer the following questions.

Question 1:

What do you understand by the ‘flash point’ of fuel?
Solution:
Every fuel has a particular temperature at which it begins to burn. This temperature is called the ‘flash point’ of the fuel.

Question 2:

(i) What are some common uses of fire?
Solution:
we use it to cook our food, warm our homes in winter and generate electricity.

(ii) In what sense is it a ‘bad master’?

Solution:
if the fire gets out of control it can be very dangerous. In this sense, it is called a bad master.

Question 3:

Match items in Column A with those in Column B.
A                      B
(i) fuel                   lighted matchstick

(ii) oxygen            air
(iii) heat                coal
                             burning coal
                             wood
                             smouldering paper
                             cooking gas

Solution:
(i) Fuel               coal

                          wood
                          smouldering paper
                          cooking gas

(ii) oxygen         air

(iii) heat             lighted matchstick
                          burning coal

Question 4:

What are the three main ways in which a fire can be controlled or put out?
Solution:
We can put out the fire by removing fuel, closing the supply of oxygen and lowering the fuel’s temperature.

Question 5:

S.N.AB
(i)To burn a paper or a piece of woodIt absorbs heat from the burning material and lowers the temperature.
(ii)Small fires can be put out.Reduces the risk of fire.
(iii)When water is spread on fire.With a damp blanket.
(iv)A carbon dioxide extinguisher is the best thing.We heat it before it catches fire.
(v)Space left between buildings.To put out an electrical fire.

Solution:

S.N.AB
(i)To burn a paper or a piece of woodWe heat it before it catches fire.
(ii)Small fires can be put out.With a damp blanket.
(iii)When water is spread on fire.It absorbs heat from the burning material and lowers the temperature.
(iv)A carbon dioxide extinguisher is the best thing.To put out an electrical fire.
(v)Space left between buildings.Reduces the risk of fire.


Question
6:

Why does a burning candle go out when you blow on it?
Solution:
We remove the hot air around the flame when we blow on a candle. Due to this, we reduce the temperature below the flash point, and the candle goes out.

Question 7:

Spraying water is not a good way of putting out an oil fire or an electrical fire. Why not?
Solution:
If water is sprayed onto an oil fire, then the oil will float to the top of the water and continue to burn. Moreover, the fire will spread all around with the flow of water. In the same way, if we apply water to an electric fire, it may give a powerful electric shock. The person can be killed.

Question 8:

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

(i) We should observe the building construction norms.

(ii) We should put fire extinguishers at home and in the school.

(iii) We should keep enough stock of sand and water.

(iv) We should be careful while using gas stoves at home or in school.

Working with Language

Question 1:

Read the following sentences.
To burn paper or a piece of wood, we heat it before it catches fire. We generally do it with a lighted match. Every fuel has a particular temperature at which it burns.
The verbs in italics are in the simple present tense. When we use it, we are not thinking only about the present. We use it to say that something happens all the time or repeatedly or that something is true in general.

Find ten examples of verbs in the simple present tense in the text ‘Fire: Friend and Foe’ and write them down here. Do not include any passive verbs.

Solution:

combines, takes place, comes, blows, bursts, heats, catches, begins, gets, stop

Question 2:

Fill in the blanks in the sentences below with words from the box. You may use a word more than once.

carbon   cause   fire    smother
  1. Gandhiji’s life was devoted to the ……………. of justice and fair play.
  2. Have you inspired your house against ……………?
  3. Diamond is nothing, but …………… in its purest form.
  4. If you put too much coal on the fire at once you will ………. it.
    Smoking is said to be the main ………… of heart disease.
  5. When asked by an ambitious writer whether he should put some ………… into his
    stories. Somerset
    Maugham murmured, “No, the other way round”.
  6. She is ……………. a copy of her mother.
  7. It is often difficult to ……………. yawn when you listen to a long speech on the value of time.

Solution:
1. cause   2. fire   3. carbon   4. smother   5. cause   6. fire   7. carbon

Question 3:

One word is italicised in each sentence. Find its opposite in the box and fill in the blanks.

           spending      shut       destroy      subtract      increase
  1. You were required to keep all the doors open, not ……………
  2. Pupil: What mark did I get in yesterday’s Maths test?
    Teacher: You got what when you add five and ……………… five and ten from the
    total?
  3. Run four kilometres a day to preserve your health. Run a lot more to
    ………………  it.
  4. If a doctor advises a lean and lanky patient to …………… reduce his weight
    further, be sure he is doing it to his income.
  5. The world is too much with us; late and soon.
    Getting and …………… we lay waste our powers.

Solution:
1. shut   2. subtract   3. destroy   4. increase   5. spending

Question 4:

Use the words given in the box to fill in the blanks in the sentences below.

           across     along     past    through 
  1. The cat chased the mouse …………… the lawn.
  2. We were not allowed to cross the frontier.
    3. So, we drove …………. it as far as we could and came back happy.
  3. The horse went …………  the winning post and had to be stopped with difficulty.
  4. It is not difficult to see …………… your plan. Anyone can see your motive.
  5. Go ……………. the yellow line, then turn left. You will reach the post office in five minutes.

Solution:
1. Across   2. along   3. past   4. through   5. along

Speaking and Writing

Question 1:

Look at the following three units. First re-order ( the items in each unit to make a meaningful sentence. Next, re-order the sentences to make a meaningful paragraph. Use correct punctuation marks in the paragraph.

  1. and eighteen fire tenders struggled/the fire began on Monday/ to douse the blaze
    ill morning
  2. in a major fire/ over 25 shops/ were gutted
  3. but property/was destroyed/worth several lakhs/no causalities were reported.


Solution:

1. The fire began on Monday and eighteen fire tenders struggled to douse the
blaze
till morning.
2. Over 25 shops were gutted in a major fire.
3. No causalities were reported, but properties worth several lakhs were
destroyed.

Class 7th English Chapter 8 Question Answer

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