Louis Pasteur Class 8 Questions Answers, SCERT

Louis Pasteur Class 8 Questions Answers, SCERT: Louis Pasteur is the lesson 5 from class 8 SCERT, Assam English text-book Sunbeam English Reader. Here, you'll get to read Louis Pasteur Class 8 Questions Answers, SCERT.

The story Louis Pasteur is about a famous scientist. Louis Pasteur was born on 27 December in 1822 in French. He was a biologist, microbiologist and chemist famous for his discoveries of the principles of vaccination, microbial fermentation and pasteurization. He found a cure for rabies, which was considered as one of the deadliest diseases of the 19th and 20th centuries.

Louis Pasteur class 8 All Questions Answers

ACTIVITIES

1. Answer the following questions to check your understanding:

(a) What happened one day while Louis Pasteur was playing with his friends ?

Ans: One day while Louis Pasteur was playing with his friends, a man came running to him. The man was very frightened and told him that someone had been bitten by a mad wolf from the mountain.

(b) What does rabies cause in human beings ?

Ans: Rabies is a species of virus. Rabies causes inflamation of the brain in human beings. It turn human beings mad and die.

(c) What experiment did Pasteur conduct on rabbits ?

Ans: Louis Pasteur carried on experiments on rabbits to find a cure for rabies. In his experiments, he injected the rabbits with the virus and succeeded in curing them.

(d) Who was Pasteur’s first human patient ? Was his treatment successful ?

Ans: Pasteur’s frist human patient was a school boy who was bitten by a mad dog. Yes, his treatment was successful.

(e) Where and when did the French government establish the Pasteur Institute ? What is it famous for ?

Ans: The French government established the Pasteur Institute in Paris in 1885. The institute is famous for studies in biology, micro-organisms, diseases, and vaccines.

2. You must have noticed that the lesson has many words related to diseases. Read the lesson carefully and note down all these words in the word web below. One has been done for you.

Ans:

3. Here are five friends sharing information about diseases. Complete their dialogues with information from the lesson.

(a) Puja: Beware of animal bites ………………………………………………………………………………………………………………..

b) Rohan: Measles is a deadly disease. It can lead to ……………………………………………………………………………………………………………………….

c) Pushpa: Rubella infection can lead to …………………………………………………………………………………………………………………….

d) Jumon: The anopheles mosquito …………………………………………………………………………………………………………..

Ans:

(a) Puja: Beware of animal bites because they may cause rabies.

(b) Rohan: Measles is a deadly disease. It can lead to Pneumonia, Diarrhoea and other life threatening complications.

(d) Jumon: The anopheles mosquito is a carrier of Malaria.

Class 8, Lesson 5 Louis Pasteur Question Answer

4) Do you know what a flowchart is ? It is a diagram that shows how one thing leads to the next. Read the lesson once again and complete the flowchart to show the chain of events. The first entry has been inserted for you.

Ans:

5. Here are some sentences from the lesson.

A man came running towards Louis Pasteur. The man was very frightened. “What is the matter ?” Louis asked him. Someone has been bitten by a mad wolf from the mountain.

Look at the words printed in italics.

Can you recall which grammatical structure is represented by the words in italics ? Fill in the blank spaces provided below to give the answer.

The words printed in italics are in the P _ _ _ _ _ _ voice.

Ans: Passive.

By changing the verb forms, the sentences can also be written in the following way :

(a) A mad wolf from the mountain has bitten someone.

This sentence is in the A _ _ _ _ _Voice.

Ans: Active.

Now, read the lesson and find out other sentences in Active voice. Reframe these sentences if necessary. Then convert them into their Passive forms.

6.(a) Let's learn some tense forms:

We use the Simple Present tense

(i) to express universal truths:

Animals with rabies grow mad.

(ii) to express habitual or repeated action:

Louis Pasteur plays with his friends.

(iii) to indicate situations that are permanent:

He works in the institute.

(b) We use the Present Continuous tense to express an action that is presently going on:

He is working on his experiment.

(c) Now complete these sentences using the simple present or the Present Continuous forms of the verbs in brackets:

(i) We ______ football in the afternoon. (play)

(ii) The sun ______ in the east. (rise)

(iii) Don't make a noise; the baby ________. (sleep)

(iv) Someone _______ at the door; can you hear it ? (knock)

(v) The man _______ towards the bus. (run)

(vi) The bus usually _______ at 8 o'clock. (come)

(vii) He _______ for an engineering entrance examination. (prepare)

(viii) He _______ German. (learn)

Ans:

(i) We play football in the afternoon.

(ii) The sun rises in the east.

(iii) Don't make a noise;the baby is sleeping.

(iv) Someone is knocking at the door;can you hear it ?

(v) The man is running towards the bus.

(vi) The bus usually comes at 8 o'clock.

(vii) He is preparing for an engineering entrance examination.

(viii) He learns German.

Louis Pasteur Questions Answers class 8 English

7. (a) We use the Simple Past tense:

(i) to talk about an action that has already taken place, e.g.

This method of treatment of rabies made Pasteur famous all over the world.

(ii) to show a series of completed actions, e.g.

He injected the boy with the virus and kept him under watch.

(b) We use the Past Continuous tense:

(i) to refer to an action that was going on for a certain period of time in the pass. e.g.

One day, a boy called Louis Pasteur was playing with his friends.

(ii) to show that something happened while another action was going on. e.g.

Many years later, when he was experimenting on rabbits, he found the deadly virus that causes rabies.

(c) Let's see how much you have understood. Complete these sentences using the simple Past or the Past Continuous forms of the verbs brackets.

(i) Louis Pasteur ______ in 1895. (die)

(ii) Pasteur knew that the mad wolf _______ from rabies. (suffer)

(iii) When I reached his house, he _______ lunch. (have)

(iv) I _______ last evening. (arrive)

(v) The boys ________ football when it suddenly began to rain. (play)

Ans:

(i) Louis Pasteur died in 1895.

(ii) Pasteur knew that the mad wolf was suffering from rabies.

(iii) When I reached his house, he was having lunch.

(iv) I arrived last evening.

(v) The boys were playing football when it suddenly began to rain.

8. Imagine you are the young boy who was bitten by the mad dog. You are telling your friends what happened when you were coming home from school. Fill in the gaps in the passage below with correct forms of the verbs to complete your story.

Yesterday I ____ _____ (return) from school alone. One the way I _____ (saw) a group of boys around a dog. The dog _______ (seem) to be mad,and the boys _______ (throw) stones at it. This _______ (make) the dog angry and frightened. The dog _______ (begin) to bark angrily. The boys _______ (find) this very funny and they ______ (hit) the dog with a stick. I _____ ______ (stand) nearby quietly. Suddenly the dog ______ (rush) at me and ______ (bite) me. I _______ (shout) to the boys to help me. But they ______ (run) away. The dog ______ (is) so angry that it ______ (will) not let go of my leg. Finally, three men from a nearby shop _______ (come) out and _______ (chase) the dog away.

Ans: Yesterday I was returning from school alone. One the way I saw a group of boys around a dog. The dog seemed to be mad, and the boys were throwing stones at it. This made the dog angry and frightened. The dog began to bark angrily. The boys found this very funny and they hit the dog with a stick. I was standing nearby quietly. Suddenly the dog rushed at me and bit me. I shouted to the boys to help me. But they ran away. The dog was so angry that it would not let go of my leg. Finally, three men from a nearby shop came out and chased the dog away.