List of top Science Questions on Our Environment asked in CBSE Class X

What does a food chain represent? “The number of trophic levels in a food chain is limited.” Give an example stating reason to justify this statement.

Use of pesticides to protect our crops affect organisms at various trophic levels especially human beings. Name the phenomenon involved and explain how does it happen.

Name the term used for the materials which cannot be broken down by biological processes. Give two ways by which they harm various components of an ecosystem.