Question 1:
How does land degradation happens? Write its unfavourable effects.
Question 2:
Write down the economic significance of forest.
Question 3:
What do you understand by the term ecological succession?
Question 4:
Make a distinction between food chain and food web with appropriate illustrations.
Question 5:
Illustrate out the term biological oxygen demand and chemical oxygen demand. Write down its significance in environmental studies.
Question 6:
Illustrate out the term hydrological cycle. Provide the pictorial representation of the hydrological cycle.