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Wednesday, 17 January 2018

Class 7th - English : Lesson 3 – Tobacco – The Silent Killer

Tobacco-The_Silent_Killer_English_7th_Lesson_3
Lesson 3 – Tobacco – The Silent Killer by (Abridged)

Working With the Text:
Q1. What is the major component of tobacco smoke?
Ans. Tobacco contains cellular irritants such as ammonia, formaldehyde, and oxides of nitrogen, but the major component is nicotine, which has harmful effects on the nervous system in humans. It causes increased heart rate and high blood pressure.

Q2. What are carcinogenic chemicals?
Ans. Carcinogenic chemicals are those chemicals which directly cause cancer. These chemicals include polycyclic hydrocarbons.
Q3. List some uses of tobacco?
Ans. Tobacco contains nicotine, which is obtained from the plant is widely used in agriculture as an insecticide. Its seed oil can be used in oil plant and varnish industries. In past, it was used as a sedative and for treatment of gastro-intestinal disorders. It is used for smoking.
Q4. What is the difference between an active smoker and a passive smoker?
Ans. An active smoker is a person who directly smokes and exhales the same smoke to the surroundings while as a Passive smoker is the person who inhales smoke because of proximity to an active smoker.
Q5. List five harmful effects of smoking?
Ans. Five harmful effects of smoking:
i. Smoking causes lung cancer.
ii. It increases heart rate and blood pressure.
iii. It can cause heart attack and stroke.
iv. It slows down the blood flow cutting off oxygen to feet and hands.
v. Carbon monoxide present in smoke decreases the oxygen supply to muscles and brain making these organs stressed.
Language Work:
1. Fill in the blank:
Carcinogenic, Columbus, Carbon monoxide, Lungs, Oxygen
1. Columbus landed in Tobago and found people using tobacco leaves.
2. Smoke contains Carcinogenic chemicals.
3. Carbon monoxide is a component in smoke.
4. Smoking decreases the oxygen supply to the tissues and organs.
5. Smoking mainly affects the lungs.
2. Make meaningful words from the jumbled letters. These words appear in the lesson.
Botococ …………………….. Tobacco
Smoingk …………………….. Smoking
Gslun …………………….. Lungs
Genoyx …………………….. Oxygen
Brnocihtis …………………….. Bronchitis
Kahooh …………………….. Hookah
Catvei …………………….. Active
Paisvse …………………….. Passive
Heathl …………………….. Health
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Grammar Work:
Use the verbs given in the brackets in correct form (Present Continuous or Present Perfect Continuous Tense) in the following sentences.
1. The child has been crying since sunset. (Cry)
2. I am crying of pain. (Cry)
3. She has been sleeping for five hours. (Sleep)
4. She is sleeping. So you cannot talk to her. (Sleep)
5. Come quickly. I am waiting for you. (Wait)
6. She has been waiting for him through the day. (Wait)
7. We have been living here for generations. (Live)
8. We are living at our maternal home all this time. (Live)
9. He is talking to somebody on the phone. (Talk)
10. He has been talking to his son for two hours. (Talk)
11. They are working in my office for a month. (Work)
12. The workers have been working in the factory for twenty years. (Work)
13. She has been mowing the lawn since morning. (Mow)
14. She is mowing her lawn. (Mow)
15. It is drizzling. (Drizzle)
16. It has been drizzling since sunrise. (Drizzle)
17. The children have been suffering from this disease since birth. (Suffer)
18. They are suffering unnecessarily because of you. (Suffer)
19. We are trying our best. (Try)
20. She has been trying hard to pass the examination. (Try)

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