Question

7. Explain winnowing.
8. What makes an object float or sink in water?
9. What is a balanced diet?
10. What are soil savers made of?
15
2.
Answer the following questions in about four to five sentences.
1. List the properties of synthetic fibres.
How are carnivores adapted to hunt animals?
3. Distinguish between taproot and fibrous root.
4. Explain the structure of the vertebral column.
5. Why does the body need a regular supply of clean water?​

Answer 1

Winnowing is an agricultural method developed by ancient cultures for separating grain from chaff. It can also be used to remove pests from stored grain. Winnowing usually follows threshing in grain preparation.

A balanced diet is a diet that contains differing kinds of foods in certain quantities and proportions so that the requirement for calories, proteins, minerals, vitamins and alternative nutrients is adequate and a small provision is reserved for additional nutrients to endure the short length of leanness.