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Make the correct answer in each of the following—
(i) Early man was frightened of
(a) lightning and volcanoes
(b) The damage caused by them.
(c) fire
(ii) (a) Fire is energy.
(b) Fire is heat and light.
(c) Fire is the result of a chemical reaction
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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 is the form of heat and light is released.
(iv) Oxygen combines with carbon and hydrogen.
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What do you understand by the "flash point' of a fuel?
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Match items in Column A with those in Column B.
| A |
B |
| (i)Fuel |
•lighted matchstick |
|
|
•air |
| (ii)oxygen |
•coal |
|
|
•burning coal |
| iii)heat |
•wood |
|
|
•smouldering paper |
|
|
•cooking gas |
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What are the three main ways in which a fire can be controlled or put out?
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Match items is Box A with those in Box B.
A
(i) To burn paper or a piece of wood,
(ii) Small fires can be put out
(iii) When water in spread on fire
(iv) A carbon dioxide extinguisher is the best thing
(v) Space left between buildings.
B
• it absorbs heat from the burning material and lowers the temperature.
• reduces the size of fire.
• with a damp blanket.
• we heat it before it catches fire
• to put out an electrical fire.
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Why does a burning candle go out when you blow on it?
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Spraying water is not a good way of putting out an oil fire or an electrical fire. Why?
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What are some of the things you should do to prevent a fire at home and in the school?
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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.
Verbs in bold type are in 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 simple present tense in the lesson 'Fire-Friends or Foe' and write them here. Aviod verbs in passive.
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Fill in the blanks in the sentences below with the words in the box.
carbon cause fire smother
(i) Gandhiji's life was devoted to the.............................of justice and fair play.
(ii) Have you insured your house against............,.?
(iii) Diamond is nothing but................ in its pure form.
(iv) If you put............ too much coat on the fire at once you will.............
(v) Smoking is said to be the main ........... of heart disease.
(vi) When asked by an ambitious writer whether he should put some ....... into his stories, Somerset Maugham murmured, "No, the their way round".
(vii) She is a ............ copy of her mother.
(viii) It is often difficult to ................ a yawn when you listed to a long speech on the value of time.
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Fill in the blanks in the sentences below with the words in the box.
carbon ,cause ,fire ,smother
(i) Gandhiji's life was devoted to the............................of justice and fair play.
(ii) Have you insured your house against............,.?
(iii) Diamond is nothing but................ in its pure form.
(iv) If you put............ too much coat on the fire at once you will.............
(v) Smoking is said to be the main ........... of heart disease.
(vi) When asked by an ambitious writer whether he should put some ....... into his stories, Somerset Maugham murmured, "No, the their way round".
(vii) She is a ............ copy of her mother.
(viii) It is often difficult to ................ a yawn when you listed to a long speech on the value of time.
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One word is italicized in each sentence. Find its opposite in the box and fill in the blanks.
Spending, shut, destory, subtract, increase
(i) You were required to keep the door open, not
(ii) Pupil : What make did I set in yesterday's Maths last?
Teacher : You get what you get when you add five and five and .......... ten from the tolal.
(iii) Run four kilometres a day to preserve your health. Run a lot more to .......... it.
(iv) If a doctor adivses a lean and lanky patient to reduce his weight further, be sure he is doing it to ............ his income.
(v) The world is too much with us; late and soon, Getting and ............. we lay waste our powers. (Wordsworth)
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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. So we drove ………. it. as far as we could and came back happy.
3. The horse went ....... the winning past and had to be stopped with difficulty.
4. It is not difficult to see ....... your plan. Any one can see your motive.
5. Go ......... the yellow line, then turn left. You will reach the post office in five minutes
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Look at the following three units . First reorder the items in each unit to make a meaningful sentence. Next, reorder 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 till morning.
2. in a major fire/over 25 shops/were gutted.
3. but property/was destroyed/worth/several lakhs/no casualties were reported
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