{"id":620376,"date":"2023-03-10T10:41:49","date_gmt":"2023-03-10T10:41:49","guid":{"rendered":"https:\/\/www.indcareer.com\/schools\/?p=620376"},"modified":"2024-05-01T05:57:53","modified_gmt":"2024-05-01T05:57:53","slug":"ncert-exemplar-class-10-science-chapter-15-our-environment","status":"publish","type":"post","link":"https:\/\/www.indcareer.com\/schools\/ncert-exemplar-class-10-science-chapter-15-our-environment\/","title":{"rendered":"NCERT Exemplar Class 10 Science\u00a0Chapter 15: Our Environment"},"content":{"rendered":"\n<p>NCERT Exemplar Class 10 Science&nbsp;Chapter 15: Our Environment. NCERT Exemplar Solutions for Class 10 Science&nbsp;Chapter 15 Our Environment prepare students for their Class 10 exams thoroughly. <\/p>\n\n\n\n<p>Science&nbsp;problems and solutions for the Class 10 pdf are provided here which are similar to the questions being asked in the previous year&#8217;s board. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-ncert-exemplar-class-10-science-nbsp-chapter-15-our-environment\"><strong>NCERT Exemplar Class 10 Science&nbsp;Chapter 15: Our Environment<\/strong><\/h2>\n\n\n\n<p>Class 10 : Science&nbsp;Chapter 15 solutions. Complete Class 10 Science&nbsp;Chapter 15 Notes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-multiple-choice-questions\"><strong>Multiple Choice Questions<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Which one of the following is an artificial ecosystem?\n<ul class=\"wp-block-list\">\n<li>(a) Pond<\/li>\n\n\n\n<li>(b) Crop field<\/li>\n\n\n\n<li>(c) Lake<\/li>\n\n\n\n<li>(d) Forest<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>In a food chain, the third trophic level is always occupied by\n<ul class=\"wp-block-list\">\n<li>(a) carnivores<\/li>\n\n\n\n<li>(b) herbivores<\/li>\n\n\n\n<li>(c) decomposers<\/li>\n\n\n\n<li>(d) producers<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>An ecosystem includes\n<ul class=\"wp-block-list\">\n<li>(a) all living organisms<\/li>\n\n\n\n<li>(b) non-living objects<\/li>\n\n\n\n<li>(c) both living organisms and non-living objects<\/li>\n\n\n\n<li>(d) sometimes living organisms and sometimes non-living objects<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>In the given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level?<br>Grass \u2192 Grasshopper \u2192 Frog \u2192 Snake \u2192 Hawk\n<ul class=\"wp-block-list\">\n<li>(a) 5 k J<\/li>\n\n\n\n<li>(b) 50 k J<\/li>\n\n\n\n<li>(c) 500 k J<\/li>\n\n\n\n<li>(d) 5000 k J<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as\n<ul class=\"wp-block-list\">\n<li>(a) eutrophication<\/li>\n\n\n\n<li>(b) pollution<\/li>\n\n\n\n<li>(c) biomagnification<\/li>\n\n\n\n<li>(d) accumulation<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Depletion of ozone is mainly due to\n<ul class=\"wp-block-list\">\n<li>(a) chlorofluorocarbon compounds<\/li>\n\n\n\n<li>(b) carbon monoxide<\/li>\n\n\n\n<li>(c) methane<\/li>\n\n\n\n<li>(d) pesticides<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called\n<ul class=\"wp-block-list\">\n<li>(a) decomposers<\/li>\n\n\n\n<li>(b) producers<\/li>\n\n\n\n<li>(c) herbivores<\/li>\n\n\n\n<li>(d) carnivores<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of\n<ul class=\"wp-block-list\">\n<li>(a) heat energy<\/li>\n\n\n\n<li>(b) light energy<\/li>\n\n\n\n<li>(c) chemical energy<\/li>\n\n\n\n<li>(d) mechanical energy<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the\n<ul class=\"wp-block-list\">\n<li>(a) food web<\/li>\n\n\n\n<li>(b) ecological pyramid<\/li>\n\n\n\n<li>(c) ecosystem<\/li>\n\n\n\n<li>(d) food chain<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Flow of energy in an ecosystem is always\n<ul class=\"wp-block-list\">\n<li>(a) unidirectional<\/li>\n\n\n\n<li>(b) bidirectional<\/li>\n\n\n\n<li>(c) multi directional<\/li>\n\n\n\n<li>(d) no specific direction<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Excessive exposure of humans to U V-rays results in<br>(i) damage to immune system<br>(ii) damage to lungs<br>(iii) skin cancer<br>(iv) peptic ulcers\n<ul class=\"wp-block-list\">\n<li>(a) (i) and (ii)<\/li>\n\n\n\n<li>(b) (ii) and (iv)<\/li>\n\n\n\n<li>(c) (i) and (iii)<\/li>\n\n\n\n<li>(d) (iii) and (iv)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>In the following groups of materials, which group (s) contains only non-biodegradable items?<br>(i) Wood, paper, leather<br>(ii) Polythene, detergent, PVC<br>(iii) Plastic, detergent, grass<br>(iv) Plastic, bakelite, DDT\n<ul class=\"wp-block-list\">\n<li>(a) (iii)<\/li>\n\n\n\n<li>(b) (iv)<\/li>\n\n\n\n<li>(c) (i) and (iii<\/li>\n\n\n\n<li>(d) (ii) and (iv)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Which of the following limits the number of trophic levels in a food chain?\n<ul class=\"wp-block-list\">\n<li>(a) Decrease in energy at higher trophic levels<\/li>\n\n\n\n<li>(b) Dufficient food supply<\/li>\n\n\n\n<li>(c) Polluted air<\/li>\n\n\n\n<li>(d) Water<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Which of the statement is incorrect?\n<ul class=\"wp-block-list\">\n<li>(a) All green plants and blue green algae are producers<\/li>\n\n\n\n<li>(b) Green plants get their food from organic compounds<\/li>\n\n\n\n<li>(c) Producers prepare their own food from inorganic compounds<\/li>\n\n\n\n<li>(d) Plants convert solar energy into chemical energy<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Which group of organisms are not constituents of a food chain?<br>(i) Grass, lion, rabbit, wolf<br>(ii) Plankton, man, fish, grasshopper<br>(iii) Wolf, grass, snake, tiger<br>(iv) Frog, snake, eagle, grass, grasshopper\n<ul class=\"wp-block-list\">\n<li>(a) (i) and (iii)<\/li>\n\n\n\n<li>(b) (iii) and (iv)<\/li>\n\n\n\n<li>(c) (ii) and (iii)<\/li>\n\n\n\n<li>(d) (i) and (iv)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about\n<ul class=\"wp-block-list\">\n<li>(a) 1 %<\/li>\n\n\n\n<li>(b) 5 %<\/li>\n\n\n\n<li>(c) 8 %<\/li>\n\n\n\n<li>(d) 10 %<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>In the given Figure 15.1 the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?<br><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2023\/03\/15895453301_466c9357d6_o.jpg\" alt=\"\">\n<ul class=\"wp-block-list\">\n<li>(a) T<sub>4<\/sub><\/li>\n\n\n\n<li>(b) T<sub>2<\/sub><\/li>\n\n\n\n<li>(c) T<sub>1<\/sub><\/li>\n\n\n\n<li>(d) T<sub>3<\/sub><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>What will happen if deer is missing in the food chain given below?<br>Grass \u2192 Deer \u2192 Tiger\n<ul class=\"wp-block-list\">\n<li>(a) The population of tiger increases<\/li>\n\n\n\n<li>(b) The population of grass decreases<\/li>\n\n\n\n<li>(c) Tiger will start eating grass<\/li>\n\n\n\n<li>(d) The population of tiger decreases and the population of grass increases<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>The decomposers in an ecosystem\n<ul class=\"wp-block-list\">\n<li>(a) convert inorganic material, to simpler forms<\/li>\n\n\n\n<li>(b) convert organic material to inorganic forms<\/li>\n\n\n\n<li>(c) convert inorganic materials into organic compounds<\/li>\n\n\n\n<li>(d) do not breakdown organic compounds<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>If a grass hopper is eaten by a frog, then the energy transfer will be from\n<ul class=\"wp-block-list\">\n<li>(a) producer to decomposer<\/li>\n\n\n\n<li>(b) producer to primary consumer<\/li>\n\n\n\n<li>(c) primary consumer to secondary consumer<\/li>\n\n\n\n<li>(d) secondary consumer to primary consumer<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Disposable plastic plates should not be used because\n<ul class=\"wp-block-list\">\n<li>(a) they are made of materials with light weight<\/li>\n\n\n\n<li>(b) they are made of toxic materials<\/li>\n\n\n\n<li>(c) they are made of biodegradable materials<\/li>\n\n\n\n<li>(d) they are made of non-biodegradable materials<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-short-answer-type-questions\"><strong>Short Answer Type Questions<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Why is improper disposal of waste a curse to environment?<\/li>\n\n\n\n<li>Write the common food chain of a pond ecosystem.<\/li>\n\n\n\n<li>What are the advantages of cloth bags over plastic bags during shopping?<\/li>\n\n\n\n<li>Why are crop fields known as artificial ecosystems?<\/li>\n\n\n\n<li>Differentiate between biodegradable and non-biodegradable substances. Cite examples.<\/li>\n\n\n\n<li>Suggest one word for each of the following statements\/ definitions\n<ul class=\"wp-block-list\">\n<li>(a) The physical and biological world where we live in<\/li>\n\n\n\n<li>(b) Each level of food chain where transfer of energy takes place<\/li>\n\n\n\n<li>(c) The physical factors like temperature, rainfall, wind and soil of an ecosystem<\/li>\n\n\n\n<li>(d) Organisms which depend on the producers either directly or indirectly for food<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Explain the role of decomposers in the environment?<\/li>\n\n\n\n<li>Select the mis-matched pair in the following and correct it.\n<ul class=\"wp-block-list\">\n<li>(a) Biomagnification \u2014 Accumulation of chemicals at the successive trophic levels of a food chain<\/li>\n\n\n\n<li>(b) Ecosystem \u2014 Biotic components of environment<\/li>\n\n\n\n<li>(c) Aquarium \u2014 A man-made ecosystem<\/li>\n\n\n\n<li>(d) Parasites \u2014 Organisms which obtain food from other living organisms<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>We do not clean ponds or lakes, but an aquarium needs to be cleaned. Why?<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-long-answer-type-questions\"><strong>Long Answer Type Questions<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Indicate the flow of energy in an ecosystem. Why is it unidirectional? Justify.<\/li>\n\n\n\n<li>What are decomposers? What will be the consequence of their absence in an ecosystem?<\/li>\n\n\n\n<li>Suggest any four activities in daily life which are eco-friendly.<\/li>\n\n\n\n<li>Give two differences between food chain and food web.<\/li>\n\n\n\n<li>Name the wastes which are generated in your house daily. What measures would you take for their disposal?<\/li>\n\n\n\n<li>Suggest suitable mechanism (s) for waste management in fertiliser industries.<\/li>\n\n\n\n<li>What are the by-products of fertiliser industries? How do they affect the environment?<\/li>\n\n\n\n<li>Explain some harmful effects of agricultural practices on the environment.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Answers<\/h2>\n\n\n\n<p><strong>Multiple Choice Questions<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"694\" height=\"194\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image.png\" alt=\"\" class=\"wp-image-639688\" srcset=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image.png 694w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-300x84.png 300w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-400x112.png 400w\" sizes=\"auto, (max-width: 694px) 100vw, 694px\" \/><\/figure>\n\n\n\n<p><strong><br>Short Answer Questions<\/strong><br><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/49067748333_a981f18ccd_o.png\"><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/49068478947_3cbfb3f31b_o.png\"><br><strong>Long Answer Questions<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"681\" height=\"369\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-1.png\" alt=\"\" class=\"wp-image-639689\" srcset=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-1.png 681w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-1-300x163.png 300w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-1-400x217.png 400w\" sizes=\"auto, (max-width: 681px) 100vw, 681px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"677\" height=\"266\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-2.png\" alt=\"\" class=\"wp-image-639691\" srcset=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-2.png 677w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-2-300x118.png 300w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-2-400x157.png 400w\" sizes=\"auto, (max-width: 677px) 100vw, 677px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"442\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-3.png\" alt=\"\" class=\"wp-image-639692\" srcset=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-3.png 800w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-3-300x166.png 300w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-3-768x424.png 768w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-3-400x221.png 400w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"747\" height=\"172\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-4.png\" alt=\"\" class=\"wp-image-639693\" srcset=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-4.png 747w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-4-300x69.png 300w, https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2024\/05\/image-4-400x92.png 400w\" sizes=\"auto, (max-width: 747px) 100vw, 747px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-exemplar-problems-solutions\/\" style=\"background-color:#f06d6d\" target=\"_blank\" rel=\"noreferrer noopener\">NCERT Exemplar Solutions<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-exemplar-class-10-Science-solutions\/\" style=\"background-color:#f06d6d\" target=\"_blank\" rel=\"noreferrer noopener\">NCERT Class 10 Exemplar Solutions<\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Exemplar Class 10 Science&nbsp;Chapter 15: Our Environment. NCERT Exemplar Solutions for Class 10 Science&nbsp;Chapter 15 Our Environment prepare students for their Class 10 exams thoroughly. Science&nbsp;problems and solutions for the Class 10 pdf are provided here which are similar to the questions being asked in the previous year&#8217;s board. NCERT Exemplar Class 10 Science&nbsp;Chapter [&hellip;]<\/p>\n","protected":false},"author":302,"featured_media":620378,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"newspack_featured_image_position":"","newspack_post_subtitle":"","newspack_article_summary_title":"Overview:","newspack_article_summary":"","newspack_hide_updated_date":false,"newspack_show_updated_date":false,"footnotes":""},"categories":[1411,24],"tags":[],"boards":[],"class_list":["post-620376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-book-solutions","category-class-10","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NCERT Exemplar for Class 10, Science\u00a0Chapter 15 - IndCareer Schools<\/title>\n<meta name=\"description\" content=\"NCERT Exemplar Class 10 Science\u00a0Chapter 15: Our Environment | Browse all Class 10 Science\u00a0Chapters NCERT Exemplar books - IndCareer Schools\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-exemplar-class-10-science-chapter-15-our-environment\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NCERT Exemplar Class 10 Science\u00a0Chapter 15: Our Environment\" \/>\n<meta property=\"og:description\" content=\"NCERT Exemplar Class 10 Science&nbsp;Chapter 15: Our Environment. 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