Question

1. What is food? List out the functions performed by food in our body.
8. Write two differences between reversible and irreversible changes with examples.
VII. Answer the following questions,
2. How is the presence of starch tested in a food item?
3. Define winnowing. How is it done?
4. Explain with diagrams the two types of venations in leaves.
5. Explain the water cycle with a suitable diagram.
6. Mention the different traditional methods of separating mixtures.
7. Define solubility. What are the factors that affect solubility?
9. State whether the followings are endothermic or exothermic reactions:
(a) melting of ice
(b) lightning eruption
(c) volcanic eruption
(d) baking soda
10. Draw and explain the process of filtration.​

Answer 1

1.Any nutrition substance that people eat or drink in order to maintain life and growth. it helps us in growth and develop and repair of muscles etc...

2..reversible irreversible

a. A substance can return a. A subs can't return

to its original state. to its orginal state.

b. most physical change are b.Allchemical chang

reversible changes. - es are irreversibl

- e changes.

eg iron and .ice eg Ashe of paper etc