CBSE CBSE Class 10 Science Class 10 Multiple Choice Questions Facebook Twitter Telegram WhatsApp MCQs of Science Class 10 Chapter 13 Our Environment MCQs of Science Chapter 13 Our Environment MCQsScience Chapter 13 Our EnvironmentClass 10 1 / 55 When is the world environment day celebrated? 16 June 5 December 5 June 5 July 2 / 55 Which of the following are environment friendly practices? carrying cloth bags to put purchases in while shopping switching off unnecessary lights and fans walking to school instead of getting your mother to drop you on her scooter all 3 / 55 Depletion of ozone is mainly due to ________ chlorofluorocarbons sulphur dioxide acid rain green house effect 4 / 55 The problem caused due to ozone hole is earthquakes damage due to UV radiations chemical pollution acid rain 5 / 55 Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called decomposers producers herbivores carnivores 6 / 55 The % of solar radiation absorbed by all green plants for photosynthesis is about ___________. 1% 5% 8% 10% 7 / 55 If a grasshopper is eaten by frog, then the energy transfer will be from : producers to decomposers producer to primary consumer primary consumer to secondary consumer secondary consumer to primary consumer 8 / 55 Which of these is a greenhouse gas? Hydrogen sulphide Methane Ozone Carbon monoxide 9 / 55 Which of the following is an example non-biodegradable substance? Virgin plastic Plastic Plants Plant products 10 / 55 In a food chain, the third trophic level is always occupied by ___________. carnivores herbivores omnivores decomposers 11 / 55 _________ can be defined as study of environment, living organisms and interaction among them. Ecology Ecosystem Edaphic none of these 12 / 55 The decomposers in an ecosystem convert inorganic material, to simpler forms convert organic material to inorganic forms convert inorganic materials into organic compounds do not breakdown organic compounds 13 / 55 In a given food chain the amount of energy at fourth trophic level is 5 KJ, what will be the energy at producer level ? 5 kJ 50 kJ 500 kJ 5000 kJ 14 / 55 Which of the following is the full form of UNEP? United Kingdom of Africa United State of America United Nations Environment programme Union English programme 15 / 55 ____________ are the organisms which feed on dead plant. Coprophages Necrophages Geophages Saprophages 16 / 55 In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level? 6000 kJ 20 kJ 60 kJ 600 kJ 17 / 55 __________ is defined as the structure and properties of a particular area. Ecology Environment Topography edaphic 18 / 55 Which of the following is not an example of abiotic factors? light plants heat temperature 19 / 55 Which of the following constituents do not form ecosystem? Biotic constituents Plastic bags Abiotic constituents All of these 20 / 55 Which of the following is biodegradable waste? DDT Aluminium can Plastic bag Cow dung 21 / 55 Which of the following is proper sequence of trophic levels? Producers, Herbivores, Top carnivores, Carnivores Top Carnivores, Carnivores, Herbivores, Producers Carnivores, Top Carnivores, Producers, Herbivores Herbivores, Carnivores, Producers, Top Carnivores 22 / 55 By which way autotrophs convert energy of food? Solar energy to chemical energy Bio-gas to chemical energy solar energy to bio-gas Chemical energy to solar energy 23 / 55 Animals that feed on other animals are called ___________. autotrophs carnivore omnivore herbivore 24 / 55 Disposable plastics plates should not be used because ______________. they are made up of light weight material They are made of toxic materials they are made up of biodegradable materials they are made up of non biodegradable materials 25 / 55 Which of the following actions may not affect the environment in worse? Plastic bags buried inside the earth. Planting of trees Excessive use of non-biodegradable pesticides Burning of plastic bags 26 / 55 Which of these organisms are the most important decomposers in an ecosystem? Algae and fungi Fungi and bacteria Algae and bacteria Bacteria and virus 27 / 55 Which of the following constitute the food chain? grass, wheat and mango grass, goat and human goat, cow and elephant grass, fish, goat 28 / 55 What is the nature of ozone? It is deadly poisonous It is fragrant It is smooth It causes purple smoke 29 / 55 ____ the temperature, higher would be the decomposition. lower moderate higher slower 30 / 55 Which of these does not belong to biotic component? Parasites Fungi Bacteria Soil 31 / 55 Which of the following is a functional unit of environment? Ecosystem Nitrogen Carbon Oxygen 32 / 55 Which of the following in not an effect of ultraviolet radiations? Causes skin cancer Causes sun burn Causes eye disease Causes typhoid 33 / 55 Which of the two sets belong to the same trophic level? Rabbit: Tiger Vulture : Rat Grasshopper : Hawk Frog : Lizard 34 / 55 Which of the following is terrestrial ecosystem? A natural forest A lake A pond An aquarium 35 / 55 What will happen if deer is missing from the food chain : grass → deer → Tiger ? the population of tiger will increase tiger will start eating grass the population of grass decrease population of tiger decrease and grass increases 36 / 55 Geophages feed on dead organic matter present ___________. plants in soil in the body on surface 37 / 55 Which of the following is the full form of CFC? Chlorofluorine carbon Carbonchlorofluorine Chlorinfluid carbon Chlorofluorocarbon 38 / 55 Which is non biodegradable? wood, paper, leather polythene, detergent, grass plastic, detergent, glass plastic, bakelite, DDT 39 / 55 The organisms of higher trophic level which feed on several types of organisms belonging to lower trophic level, constitute the _____________. food web ecological pyramid ecosystem food chain 40 / 55 Which of the following is an example of human made ecosystem? Aquarium Sunlight Wind Water 41 / 55 Which of the following is an example of herbivores? cow shark lion tiger 42 / 55 Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as eutrophication pollution biomagnification accumulation 43 / 55 The excessive exposure of humans to UV rays results in : damage immune system skin cancer peptic ulcers damage to lungs 44 / 55 Which is incorrect: all green plants and blue green algae are producers green plants get their food from organic compounds producers prepare food from inorganic substances plants convert solar energy to chemical energy 45 / 55 Name the thing in our body which helps us to digest food? hormone enzymes stomach mouth 46 / 55 __________ is a biodegradable pollutant. paper cotton cloth cotton DDT 47 / 55 Which human-made material cannot be broken down by the action of bacteria? human flesh flesh of dead animal vegetable peels plastic 48 / 55 Which of the following is an example biodegradable substance? Glass Plants Plastics Polythene 49 / 55 How many atoms of oxygen are there in ozone? 1 2 3 4 50 / 55 Which of the following groups contain only biodegradable items ? grass, flowers, leather grass, wood, plastics fruit peels, grass and lime juice cake, wood, polythene 51 / 55 The flow of energy in ecosystem : unidirectional Bidirectional multidirectional no specific direction 52 / 55 Which of the following is the best way for disposal of vegetable and fruit peels? Landfill Recycling Composting Burning 53 / 55 It which of the following devices CFC’s are not produced? Refrigerators Fire extinguishers Pressurized cans Pencil 54 / 55 An ecosystem includes all living organisms non-living objects both living organisms and non-living objects sometimes living organisms and sometimes non-living objects 55 / 55 In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of heat energy light energy chemical energy mechanical energy Your score isThe average score is 69% 0% Restart quiz
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