Enjoy with Social Life-5 [106-136] - School Books Publishers India

More documents

Recommendations

Info

F. Answer the questions : 1. What modern inventions have helped in surgery and how Ans. Modern inventions of Chloroform and Antiseptics have helped in surgery too much. Chloroform is used to make a person unconscious that he does not feel pain. Antiseptics can be used in operation theaters to kill germs. It do not injure any body tissue also. 2. What do you understand by pasteurization Ans. The process of killing gems by boiling or heating is called pasteurization. 3. What are the different ways to prevent diseases Ans. 'Prevention is better than cure'. To prevent diseases preventive medicines and vaccines can help us. Another way of preventing diseases is by failing the harmful germs through pasteurization and DDT, Malathion and BHC, etc. 4. What is chloroform used for Ans. Chloroform is used to make a person unconscious. 5. Why is thermometer important for doctors Ans. Thermometer is used to check the temperature of the body and helps the doctors to treat the patient correctly. Project/Activity : G. Visit a nearby hospital and observe how new machines are being used to treat patients. Ans. Do yourself. H. Make a chart about the diseases generally occur in rainy season. Also mention the points to prevent them. Ans. Do yourself. 14. The Age of Machines Exercise A. Write True or False : 1. Mass production reduced the costs of items. True 2. Coal and petroleum will last forever. True 3. Dams produce hydroelectricity. True 4. Copper was discovered after iron. False 5. Volta developed a battery to produce electricity. True B. Fill in the blanks : 1. The discovery of copper must have be accidental. 2. The tools of early man were made of stones and bones. 3. Coal was the first and most important fuel to be used in machines on a large scale. 4. Battery was developed by Volta in Italy. 5. Gobar gas is produced by Gobar. 6. The Thermal electricity is produced by burning fuel like coal, mineral oil or natural gas. 126 Bookman India Enjoy with Social Life [1-5]
C. Match the following : 1. James Watt (a) Electricity 2. Gottlieb Daimler (b) Railway engine 3. Volta (c) Steam engine 4. Franklin (d) Battery 5. George Stephenson (e) Petrol powered machine D. Answer the following : 1. Which was the first metal that man discovered How did it prove beneficial for him Ans. Copper was the first metal that man discovered. He used it to make tools and utensils which were useful in forming the land and hunting the animals. 2. What is an alloy How did man prepare it Ans. A mixture of two metals is called an alloy. Man began to mix copper with zinc and tin to make new alloys like brass and bronze. 3. How did the invention of steam engine prove to be a blessing Ans. The power of steam engine was also used to run different types of machines. It increased productivity, reduced costs and improved quality. It was much more profitable. It was so successful that it became a model for the later inventions in steal locomotives. 4. What is industrial revolution Ans. The change from hand made goods to machine made goods is known as the industrial revolution. 5. How is water power produced Ans. When the water falls from a great height of a dam, water power is produced. It is called hydel power or hydro electricity. 6. What is fuel Ans. The material such as coal, gas or oil that is burned to produce heat or power is known as fuel. Project/Activity : E. Draw pictures of various sources of energy on a chart. Ans. Do yourself. F. Visit a gobar gas plant and find out how is it useful to the farmers. Ans. Do yourself. 15. Some People Live Forever Exercise A. Write True or False : 1. Abraham Lincoln was the President of the United Kingdom. True 2. Mahatma Gandhi was born on October 2, 1969. False 3. Gandhiji's struggle was based on violence. False 4. Martin Luther King followed the path of non-violence. True 5. Martin Luther King was awarded Nobel Prize for peace. True 127 Bookman India Enjoy with Social Life [1-5]
Page 1 and 2: Enjoy with SOCIAL A Book on Social
Page 3 and 4: 5. Why is the Southern Hemisphere k
Page 5 and 6: C. Write one line about each of the
Page 7 and 8: 4. Which major crops are gown in Za
Page 9 and 10: Project/Activity : G. Collect the p
Page 11 and 12: 4. What type of life do Bedouins li
Page 13 and 14: 8. Conquering Distances Exercise A.
Page 15 and 16: D. Write two lines about each of th
Page 17 and 18: 3. How does pollution soil affect h
Page 19 and 20: 4. During cyclone : (a) We should g
Page 21: Project/Activity : F. Write the nam
Page 25 and 26: (Multiple Choice Questions) Based o
Page 27 and 28: 5. What does UNICEF do for the chil
Page 29 and 30: D. Name any three : 1. Moderate lea
Page 31 and 32: 2. What was the Quit India Movement

Enjoy with Social Life-5 [106-136] - School Books Publishers India

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?