Class Notes
Class: VII Topic: WORKSHEET BASED ON LONG
ANSWER TYPE QUESTIONS
Subject: SCIENCE
FOR PRACTICE
1. How the silk fibres are obtained from cocoon?
2. Write the steps to obtain wool fibres.
3. Differentiate between natural and artificial silk.
4. Define the following terms:
• Selective breeding
• Rearing
• Shearing
• Sericulture
• Scouring
5. Why an antacid tablet is taken when anyone suffers with acidity?
6. Name three acids and three bases with their formulae.
7. What is acid rain? What are the affects of acid rain?
8. Write a short note on soil profile (layers of soil).
9. List the similarities and differences between aerobic and anaerobic respiration.
10.Why do we often sneeze when we inhale dust laden air?
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Explanation:
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