CBSE Class 10 Our Environment — practice questions
56 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 10 Our Environment in the app →Per NCERT Class 10 Economics Ch 1, what is SUSTAINABLE DEVELOPMENT?Per NCERT Example 1, what is happening to GROUNDWATER in India?Per NCERT Example 2, what is the difference between RENEWABLE and NON-RENEWABLE resources?Per NCERT, what is one example of a NON-RENEWABLE resource that is being EXHAUSTED globally?Per NCERT, why are PUBLIC FACILITIES often a better indicator of development than income alone?Per NCERT, what is meant by the NET ATTENDANCE RATIO — a key development indicator?Per NCERT, why are countries' STAT classifications by World Bank or UNDP useful — despite limitations?Per NCERT, what kind of development would you call 'NOT SUSTAINABLE' — based on the chapter's examples?Per NCERT, why might different countries with the SAME per capita income end up with DIFFERENT development outPer NCERT, what does the term 'standard of living' typically mean — as used in the chapter?Per NCERT, why is GROWTH alone NOT sufficient for true DEVELOPMENT — per the chapter's argument?Per NCERT, the IMR (Infant Mortality Rate) in INDIA in recent years is approximately what range — illustratingWhich of the following is a DECOMPOSER in a typical ecosystem?According to the 10% Law of energy transfer in a food chain:The concentration of pesticides like DDT INCREASES as we move up the food chain. This phenomenon is called:The ozone layer protects life on Earth by:The international treaty that phased out CFC use to protect the ozone layer is the:Which of the following is BIODEGRADABLE waste?The principle of '3 R's' for environmental conservation refers to:An ecosystem consists of:Organisms that produce their own food using sunlight are called:Decomposers help in the ecosystem by:The 10% law of energy transfer states that:In a typical food chain "grass → grasshopper → frog → snake", the frog is at the:The flow of energy in an ecosystem is:Biomagnification refers to:Ozone in the stratosphere is important because:Stratospheric ozone is formed by the action of UV radiation on:Chlorofluorocarbons (CFCs) damage the ozone layer because they:The Montreal Protocol (1987) aimed at:A substance broken down by biological processes is:Which of the following is non-biodegradable?A food web is best described as:In any ecosystem, the largest population in numbers usually belongs to the:The phenomenon by which non-biodegradable chemicals get progressively concentrated up the food chain is calledWhat is the role of producers in any food chain?The ozone "hole" first widely reported in the 1980s was located over:A pond ecosystem provides examples of all of the following EXCEPT:Why do food chains rarely have more than four or five trophic levels?A garbage dump emitting foul gases and leachate is BEST managed by:In which form is energy lost as it moves up the trophic levels?Which gas is produced in the largest quantity by anaerobic decomposition of organic waste in landfills?Ozone (O₃) at ground level is:Carnivores are usually fewer than herbivores in number because:Which is the simplest correct food chain in a grassland ecosystem?Increased UV radiation due to ozone depletion can cause:Why is reducing plastic use important for the environment?Which group of organisms recycles nutrients in an ecosystem?A piece of vegetable peel and a polythene bag are buried in soil for 6 months. What is observed?Why is the use of pesticides problematic for ecosystems?Composting kitchen waste at home contributes to:The Tyndall effect in air refers to scattering of light by:In a food chain "Grass → Deer → Tiger", which trophic level has the LEAST energy available?The aim of segregating "dry" and "wet" waste at the household level is:The flow chart "Sun → producer → consumer → decomposer" describes:Why must global cooperation continue even after CFCs are banned?