Embibe Experts Solutions for Chapter: Our Environment, Exercise 1: CBSE-2022 (Delhi Term II - I)

Write the essential function performed by ozone at the higher levels of the Earth’s atmosphere? How is it produced? Name the synthetic chemicals mainly responsible for the drop of the amount of ozone in the atmosphere. How can the use of these chemicals be reduced?

 Which one of the following is responsible for the sustenance of underground water?

Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.

Write one difference between biodegradable and non-biodegradable wastes. List two impacts of each type of the accumulated waste on environment if not disposed off properly.

Write the percentage of solar energy captured by the autotrophs in a food chain.

Write the percentage of energy transferred from autotrophs to the next level in a food chain.

What are trophic levels? Why do different food chains in an ecosystem not have more than four to five trophic levels? Give reason.

If a harmful chemical enters a food chain comprising peacock, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body. Justify your answer. Name the process involved and define it.