Q1. Why some substances are degraded and others not?

Q2. Construct a food chain composing the following Snake, hawk,rats,palnts?

Q3. If all the wastes we generate is bio-degradable what impact may this have on the environment?

Q4. Write the harmful effect of ozone depletion.

Q5. What are decomposers and what is the importance of them in the ecosystem?

Q6. Why flow of energy is unidirectional whereas flow of nutrients is cyclic?

Q7. What will happen to grasslands if all the grazers are removed from there?

Q8. What is biological magnification and give its cause?

Q9. What limits the number of trophic levels in a food chain?

Q10. What will happen if decomposers are not there in the environment?

Dear Student

1. Only the substances which are made up of living organisms are degradable by natural processes and organisms. Other substances like which are radioactive in nature, made up of metals, plastics etc. are not degradable or take millions and hundreds of years to degrade.

2. Plants →Rats → Snake →Hawk

3. If all the wastes we generate is bio-degradable, then the amount of pollution and harmful wastes in our environment will decrease enormously. It will make the environment clean and healthy. Also, the diseases and health problems will decrease and people will be able to live a healthier and happier life.

Due to the paucity of time, all your questions cannot be answered. Here, I am answering some of your questions. Try finding the rest of them on your own. They are provided in the study material. Do get back to us for further doubts.