UP Board Class 10 Our Environment — practice questions
37 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UP Board Class 10 Our Environment in the app →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?