15. Our Environment

Description:

Master Chapter 15 – Our Environment with this concise and exam-ready PDF designed for Class 10 CBSE students. This downloadable resource includes 18 high-probability board exam questions with detailed answers, illustrations, and explanation-based reasoning—all aligned with the CBSE 2024–25 syllabus. Whether it’s understanding food chains, trophic levels, or managing non-biodegradable waste—this guide ensures you're fully prepared.

Why Choose This Book?

✅ Strictly follows NCERT & CBSE 2024–25 exam guidelines

✅ Board-level answering style with 1–3 mark question coverage

✅ Diagrams & reasoning-based questions included

✅ Best for last-minute revision & scoring environmental science marks

✅ Bonus: 10% energy law, biological magnification, ozone formation explained

What You Will Learn?

✅ The various components of an ecosystem are interdependent.

✅ The producers make the energy from sunlight available to the rest of the ecosystem.

✅  There is a loss of energy as we go from one trophic level to the next, this limits the number of trophic levels in a food-chain.

✅ Human activities have an impact on the environment.

✅ The use of chemicals like CFCs has endangered the ozone layer. Since the ozone layer protects against the ultraviolet radiation from the Sun, this could damage the environment. 

✅ The waste we generate may be biodegradable or non-biodegradable. 

✅ The disposal of the waste we generate is causing serious environmental problems.

What's Inside the Book? 

Total Pages: 10–12

Format: Printable PDF (instant download)

Includes:

✅ All NCERT textbook-based important questions

✅ HOTS & case-based reasoning questions

✅ Labeled diagram-based questions (e.g., energy flow in ecosystem)

✅ Definitions, explanations, and science-backed reasoning

Chapter Coverage 

1. Biodegradable vs. Non-biodegradable substances

2. Food chains, food webs & trophic levels

3. 10% energy law and its diagram

4. Biological magnification and pesticide impact

5. Ozone layer depletion & its chemical formation

6. Effects of non-biodegradable waste

7. Role of decomposers in ecosystems

8. Human impact on energy flow

9. Short/Long answer questions, all within CBSE exam pattern

Who Can Benefit from This Book? 

✅ Class 10 CBSE students aiming for full marks in Biology

✅ Parents supporting their child’s exam preparation

✅ Tutors looking for reliable reference material

✅ Students who struggle with environment-based reasoning & diagrams

✅ Learners revising one chapter per day strategy

How to Use This Book Effectively? 

✅ Begin with topic-wise questions and attempt writing answers

✅ Review diagrams and explanations—practice drawing them

✅ Study 3–4 questions per session to avoid burnout

✅ Revise using the summary questions before exams

✅ Highlight examples, values, and definitions for quick recall

Frequently Asked Questions (FAQs)