Question

(A) Give two examples for each of the following.
1. Desirable change
2.Undesirable change
3.Periodic change
4. Non periodic change
5.Natural change​

Answer 1

Answer:

1. turning of pulp into paper, ripening of mango

2. turning of fuel into chloroflurocarbon, pure water into waste water

3. water cycle, printing of newspaper

4. earthquakes, cyclones

5. weathering, carbon-dioxde into oxygen by plants

Explanation:

Answer 2

e: ripening of fruits and germination of seeds

2. Undesirable change: rusting of Iron and rottening of fruits.

3. Periodic change: change of seasons and beating of heart

4.Non periodic change: water becoming ice and burning of a matchstick

• 5. Natural change: growth in man and chemical reactions

Explanation:

long answer