I. CHOOSE THE CORRECT ANSWER:
1. ________________ discovered a drug called Penicillin.
a. Louis Pasteur b. Edward Jenner c. Alexander Fleming
2. _____________ tools were used to cut down trees and clear forests for agriculture.
a. Silver b. Iron c. Tin.
3. __________ is used to examine your chest and back when you are ill.
a. Microscope b. Stethoscope c. Scanner
II. FILL IN THE BLANKS:
1. ________________________was the first metal to be discovered.
2. _______________________are very tiny living things that cause diseases
3. ________________________ is the source of energy found deep inside the earth.
4. The first vaccine was discovered against the dreaded disease called ___________
III. NAME THEFOLLOWING:
1. The inventor of the first microscope- _____________________
2. The first fuel used in steam engines to produce steam- ________________
3. Energy produced from flowing water- _______________________
IV. ANSWER THE FOLLOWING QUESTION.
1. How are alternative sources of energy helpful to us?
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2. What do you understand by pasteurization?
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3. Name the first drug used as an anesthetic.
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4. What do you understand by ‘Industrial Revolution’?
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5. ‘Bronze was harder than copper’. Give reason.
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6. Mention the basic difference between medicines and vaccines.
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7. Suggest two ways to remain healthy.
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8. What are the problems in using coal as a source of energy?
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