Experiment of soup in 10th class test book according to Louis pasteru
Answers
Answer:
Answer the following questions briefly:
Question 1.
“Louis Pasteur was not a soldier, but he was a fighter.” What does the statement mean?
Answer:
Though Louis Pasteur did not join the army and become a soldier, he was a fighter because he fought various kinds of diseases through his discoveries about bacteria.
Question 2.
What are bacteria?
Answer:
Bacteria are vegetable organisms – little rod shaped plants which exist in the air, water and soil, and in the bodies of animals and plants; some but not all are the causes of diseases; some convert matter into food for plants.
Question 3.
As a scientist, how was Louis Pasteur unique ?
Answer:
Louis Pasteur not only made some exciting discoveries about germs but he was also able to use his discoveries in very practical ways. He could help many people running various industries in France.
Question 4.
How did Pasteur try to solve difficult problems?
Answer:
Pasteur used to sit for hours, quite silent and motionless, thinking hard about the difficult problems.
Question 5.
How would Pasteur react whenever he solved a problem?
What does this reveal about him as a person?
Answers:
When he thought of a solution, his kind, a tired looking face would brighten with pleasure and excitement, and he would rush round to tell his discovery to his wife and to others who were helping him.
This shows that Pasteur was sincere about solving problems and was also very simple and child-like in sharing his discoveries with others.
Question 6.
What discoveries did Pasteur make about yeast?
Answer:
Yeast is used to making the beer foam. Pasteur discovered that yeast was alive, made up of tiny living cells. When these cells were healthy, the yeast acted well, but if they were diseased, the yeast and the beer went wrong.
Question 7.
What does ‘spontaneous generation’ mean?
Answer:
Some scientists believed in ‘spontaneous generation’, i.e., they believed that germs had no parents but just occurred by themselves.
Question 8.
Did Pasteur believe in Spontaneous generation? If not, what did he believe in?
Answer:
Pasteur and some scientists like him believed that germs were carried in the air and might infect other things that came in contact with them.
Question 9.
In the statement, “Pasteur proved that he was right” (Para 9), What did he prove?
Answer:
Pasteur proved that germs were carried in the air and might infect other things that came in contact with them.
Question 10.
In the second soup experiment (para 10) which soup was the worst, which was the best and which one was better?
Answer:
In the second soup experiment, the bottles opened in the hotel bedroom were full of soup which had gone completely mouldy due to the presence of many germs; the bottles opened in the field were mouldy, but not quite so bad; those opened on the mountain had no germs in them at all. The last batch was the best, the first one was worst, and the second one better than the first one.