Class 10 Science Chapter 13 MCQ : Our Environment MCQs Quiz
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Have you ever wondered how nature maintains a perfect balance or what happens to the waste we throw away? Class 10 Science Chapter 13 Our Environment is a crucial chapter that teaches us about the delicate interactions within ecosystems and the impact of human activities. To help you master topics like food chains, trophic levels, and waste management, we have curated a comprehensive Our Environment MCQs Quiz in English. This quiz covers every vital concept, from the functioning of an ecosystem to the depletion of the ozone layer. Practicing these Class 10 Science MCQs is the most effective way to prepare for your CBSE Board exams and understand the science behind preserving our planet.
Class 10 Science Chapter 13 MCQ : Our Environment MCQs Quiz
Chapter 13, Our Environment, focuses on the interactions of organisms with their surroundings. It defines an Ecosystem as the sum total of all biotic (living) and abiotic (non-living) factors in a given area. Students learn about Food Chains and Food Webs, discovering how energy flows through different trophic levels (producers, consumers, decomposers) and the 10% Law of energy transfer. The chapter also critically examines waste management, distinguishing between Biodegradable and Non-biodegradable substances and their environmental impact. Furthermore, it discusses global issues like the Ozone Layer, its formation, and depletion caused by chemicals like CFCs, emphasizing the importance of environmental conservation.
Conclusion
Scoring high marks in Class 10 Science Chapter 13 requires a good understanding of biological processes and environmental awareness. By attempting this Our Environment Class 10 MCQs Quiz, you have tested your knowledge on energy flow, waste disposal, and ecological balance. Regular practice of these Class 10 Science Chapter 13 Quiz questions will help you recall key terms like “trophic level” and “decomposers” with ease. Review your answers, strengthen your weak areas, and ensure you are ready to ace the exam while staying informed about your environment. Good luck!
FAQs on Class 10 Science Chapter 13 MCQ : Our Environment MCQs Quiz
- What is an Ecosystem?
An ecosystem is a self-sustaining structural and functional unit in nature where living organisms (biotic) interact with non-living components (abiotic) like air, water, and soil. - What is the 10% Law of Energy Transfer?
Proposed by Lindeman, the 10% Law states that only 10% of the energy available at one trophic level is transferred to the next trophic level; the rest is lost to the environment as heat. - Distinguish between biodegradable and non-biodegradable waste.
Biodegradable waste (like vegetable peels) can be broken down by microbes, whereas non-biodegradable waste (like plastic and glass) cannot be broken down by biological processes and persists in the environment. - What is the function of decomposers in the ecosystem?
Decomposers (like bacteria and fungi) break down dead organic matter and convert it into inorganic substances, returning nutrients to the soil for use by producers. - Why should plastic bags be avoided for garbage disposal?
Plastic bags should be avoided because they are non-biodegradable, harm animals that ingest them, and clog drains. They do not decompose naturally and accumulate in the environment. - What is the Ozone Layer and why is it important?
The ozone layer is a layer of ozone gas ($O_3$) in the upper atmosphere that absorbs harmful ultraviolet (UV) radiation from the sun, protecting living organisms from its damaging effects. - What is a Food Web?
A food web is a complex network of interconnected food chains that represents the multiple feeding relationships between different organisms in an ecosystem. - What are the different trophic levels in a food chain?
The trophic levels are: 1. Producers (Autotrophs), 2. Primary Consumers (Herbivores), 3. Secondary Consumers (Carnivores), and 4. Tertiary Consumers (Top Carnivores). - Name the chemicals responsible for Ozone Layer depletion.
Chlorofluorocarbons (CFCs) are the primary chemicals responsible for the depletion of the ozone layer. They are used in refrigerants and aerosols. - What happens in a biological magnification?
Biological magnification (Biomagnification) is the process where harmful chemicals like pesticides increase in concentration at each successive trophic level in a food chain.
Test your knowledge with Class 10 Science Chapter 13 MCQ : Our Environment MCQs. Master ecosystems, food chains, and waste management for CBSE exams!
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