CBSE Worksheet for chapter- 13 Our Environment class 10

Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of CBSE Board Worksheet for Class 10 Biology. Students of Class 10 Biology can get a free Worksheet for Class 10 Biology in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Biology in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Botany Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

For those who are preparing for NEET Exam can check the Biology MCQ for NEET.

Q1. The decomposers in an ecosystem:

1. Convert inorganic material to simple forms
2. Convert organic materials to inorganic forms
3. Convert inorganic materials into organic compounds
4. Do not breakdown organic compounds

Q2. Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute the:

1. Ecosystem
2. Food web
3. Ecological pyramid
4. Food chain

Q3. The excessive exposure of humans to ultraviolet rays results in:

1. Damage of immune system
2. Damage to lungs
3. Skin cancer
4. Peptic ulcers

• (i) and (ii)
• (ii) and (iv)
• (i) and (iii)
• (iii) and (iv)

Q4. Which of the following is the best method to dispose of biological wastes from hospitals?

1. Lanfill
2. Recycling
3. Incineration
4. Composting

Subjective Type Questions

Q5. Why are some substances biodegradable and some non-biodegradable ?

Q6. What are trophic levels ? Give an example of a food chain and state the different trophic levels in it.

Q7. What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem ?

Q8. What are the problems caused by the non-biodegradable wastes that we generate ?

Q9. Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage ?

Q10. List the biotic and abiotic components of an ecosystem.

Q11. What is an ecosystem? List its two main components.

Q12. Give an example to illustrate that indiscriminate use of pesticides may result in degradation of the environment.

Q13. What will happen if we kill all the organisms in one trophic level ?

Q14. Why are bacteria and fungi are called decomposes ?

Q15. How is the increasing demand for energy adversely affecting our environment ?