Class 9 Science Chapter 13 Our Environment MCQ with Answers | 30 Solved Questions
Class 9 Science Chapter 13 focuses on Our Environment — a crucial topic that connects ecology, biodiversity, and human impact on nature. This comprehensive guide includes 30 solved MCQs designed by CBSE educators to help you master concepts like ecosystems, food chains, waste management, and conservation. Whether you're preparing for term exams or competitive entrances, these questions reflect the exact style and difficulty of CBSE board papers. Practice with verified answers and detailed explanations to build confidence and score higher.
Your child's private AI tutor — trained on NCERT.
3-day free trial · ₹1 to start · Cancel anytime.
Understanding Ecosystems & Energy Flow
An ecosystem is a functional unit of nature comprising living organisms and their physical environment. Chapter 13 emphasizes biotic components (producers, consumers, decomposers) and abiotic factors (light, water, temperature). Energy flows from the sun through producers to primary and secondary consumers. MCQs in this section test your grasp of food chains, food webs, and trophic levels — core NCERT concepts essential for board exams.
Food Chains, Food Webs & Energy Transfer
A food chain shows the linear transfer of energy: grass → grasshopper → frog → snake. Food webs are interconnected food chains showing realistic feeding relationships. CBSE questions often ask about the 10% energy law — only 10% of energy passes to the next trophic level. Understanding this principle helps explain why ecosystems support fewer top predators. Our MCQs drill these relationships thoroughly.
Biodiversity & Conservation
Chapter 13 introduces biodiversity as the variety of life in ecosystems. Protected areas like national parks and sanctuaries conserve endangered species. NCERT emphasizes India's role in preserving biodiversity hotspots. MCQs test your knowledge of red data books, threatened species, and conservation strategies. These questions align with CBSE's focus on environmental responsibility and India's conservation initiatives.
Waste Management & Pollution
Proper waste disposal is vital for environmental health. Chapter 13 covers biodegradable and non-biodegradable waste, landfills, composting, and recycling. Questions address air, water, and soil pollution caused by industrial and human activities. CBSE exams emphasize the 3Rs: Reduce, Reuse, Recycle. Our solved MCQs clarify these concepts and their real-world applications for sustainable living.
Ozone Depletion & Climate Change
The ozone layer protects Earth from harmful ultraviolet radiation. CFCs and halons damage this layer, creating the ozone hole. Chapter 13 also covers greenhouse gases (CO₂, methane) that trap heat, causing global warming. NCERT explains consequences: rising sea levels, changing weather patterns, ecosystem disruption. Our MCQs test understanding of these environmental crises and international agreements like the Montreal Protocol.
Why CBSETUTOR.ai is India's Most Trusted CBSE AI Tutor
CBSETUTOR.ai is used by hundreds of thousands of CBSE families across India for Class 9 Science and all subjects. Our AI tutors provide 24x7 personalized support, instant doubt resolution, and adaptive learning paths. For Chapter 13, students get concept videos, interactive MCQs, and real-time progress tracking. Whether Hindi or English medium, CBSETUTOR.ai covers your board exam prep comprehensively — making it the preferred choice for serious CBSE learners nationwide.
Human Impact on Natural Resources
Deforestation, overgrazing, and overfishing deplete natural resources. Chapter 13 highlights how human activities disrupt ecosystems and reduce biodiversity. The carrying capacity of land is finite — unsustainable practices lead to resource scarcity. CBSE questions examine the balance between development and conservation. Our MCQs help you analyze case studies and propose sustainable solutions, skills tested in both objective and subjective exam formats.
30 Solved MCQs: Topic-Wise Breakdown
Our collection spans ecosystems (8 Q), food chains (6 Q), biodiversity (5 Q), waste management (4 Q), pollution (4 Q), and climate change (3 Q). Each MCQ includes the correct answer, explanation, and NCERT reference. Difficulty levels range from basic recall to application and analysis — matching actual board exam patterns. Regular practice builds conceptual clarity and exam confidence, ensuring you're fully prepared for your Class 9 Science terminal assessment.
How to Score Higher in Chapter 13 MCQs
Read each question carefully; environmental MCQs often include tricky distractors. Link concepts: understand how energy flow relates to food chains and conservation. Use diagrams while studying — ecosystems are visual topics. Practice timed quizzes to improve speed and accuracy. Review your mistakes to identify weak areas. NCERT Chapter 13 is straightforward if you understand core principles; our annotated answers reinforce these fundamentals for lasting retention and exam success.
Board Exam Preparation Strategy
Allocate 2–3 weeks for Chapter 13 revision. Day 1–2: read NCERT, highlight key terms. Day 3–5: solve our 30 MCQs in topic clusters. Day 6–7: review difficult questions and take a full-length mock test. Track accuracy trends. Weak topics deserve extra focus. For board exams, 2–3 mark questions often stem from MCQ concepts, so mastering these 30 questions equips you to answer both objective and short-answer questions confidently.
Frequently asked questions
What topics are covered in Class 9 Science Chapter 13 Our Environment MCQs?+
Our 30 MCQs cover ecosystems, food chains, biodiversity, waste management, pollution, ozone depletion, climate change, and human impact on natural resources — all core NCERT Chapter 13 topics aligned with CBSE exam patterns.
Are these MCQs based on the latest NCERT 2024-25 curriculum?+
Yes, all 30 questions follow the updated NCERT 2024-25 textbook for Class 9 Science. Content, terminology, and concepts are verified against the official curriculum to ensure exam accuracy.
How can CBSETUTOR.ai help me prepare for Chapter 13 beyond these MCQs?+
CBSETUTOR.ai offers concept videos, interactive quizzes, doubt-solving sessions, and personalized study plans for Chapter 13. Our AI tutors provide 24x7 support in Hindi and English, making CBSE prep accessible and effective for all learners.
Is CBSETUTOR.ai free, or does it require a subscription?+
CBSETUTOR.ai offers a free trial so you can explore our full platform before committing. Paid plans unlock unlimited tutoring, custom practice sets, and progress analytics — affordable options for every family's budget.
Are these answers suitable for Hindi-medium students?+
Absolutely. All 30 MCQ answers include bilingual support — content is available in both English and Hindi. CBSETUTOR.ai fully supports Hindi-medium CBSE learners with translated resources and vernacular tutoring.
How difficult are these MCQs compared to actual CBSE board exams?+
Our MCQs span basic recall to application-level questions, mirroring actual CBSE exam difficulty. Each is designed to test conceptual understanding, problem-solving, and analytical skills — preparing you for real board exam scenarios.
Can I use these MCQs for competitive exams like NEET or JEE Foundation?+
While focused on CBSE, these 30 MCQs build foundational biology concepts useful for competitive exams. For subject-specific NEET/JEE prep, CBSETUTOR.ai offers dedicated competitive exam modules alongside board curriculum.
What should I do if I score poorly on the practice MCQs?+
Identify weak topics, reread NCERT sections, watch concept videos, and retake MCQs after a few days. CBSETUTOR.ai's adaptive learning tracks your performance and recommends targeted review — turning gaps into strengths efficiently.
Related resources
Online Class 9 Science Tutor in Mumbai – 24/7 CBSE-Aligned AI CoachingBest Online Class 9 Science Tutor in Pune — 24/7 AI Learning, ₹9,999/MonthBest Online Class 9 Science Tutor in Chandigarh – AI-Powered 24/7 LearningClass 9 Science Tutor in Karnal: 24/7 AI-Powered NCERT CoachingExpert Online Class 9 Science Tutor in Agra | CBSE-Aligned AI CoachingOnline Class 9 Science Tutor in Meerut – 24/7 CBSE Coaching, ₹9,999/MonthOnline Class 9 Science Tutor in Delhi – 24/7 AI-Powered CBSE CoachingClass 9 Mathematics Chapter 1: Orienting Yourself – The Use of Coordinates MCQ Quiz with Answers
Keep learning — related guides
Sanskrit
Class 9 Sanskrit Chapter 12 वाङ्गमयं तपः: 30 MCQ Questions with Answers & Explanations
Sanskrit
Class 9 Sanskrit Chapter 11 पर्यावरणम् MCQ Quiz – 30 Questions with Answers
Sanskrit
Class 9 Sanskrit Chapter 10 जटायोः शौर्यम् MCQ Quiz – 30 Questions with Answers & Explanations
Sanskrit
Class 9 Sanskrit Chapter 9 सिकतासेतुः MCQ Quiz with Answers (2024–25 CBSE Syllabus)
Sanskrit
Class 9 Sanskrit Chapter 8 लौहतुला: 30 MCQs with Answers & Explanations
Sanskrit
Class 9 Sanskrit Chapter 7 प्रत्यभिज्ञानम् MCQ Quiz – 30 Questions with Answers
Ready to give your Class 9 child the tutor that never sleeps?
CBSETUTOR.ai covers every chapter in the Class 9 NCERT syllabus — Maths, Science, Social Science, English, Hindi and more. 24×7. Patient. Unlimited. 3-day free trial.
Start your child's 3-day free trial →