{"id":4775,"date":"2016-05-18T11:49:00","date_gmt":"2016-05-18T06:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-8-science-13-sound\/"},"modified":"2018-06-25T12:14:12","modified_gmt":"2018-06-25T06:44:12","slug":"ncert-solutions-for-class-8-science-sound","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/","title":{"rendered":"NCERT Solutions for Class 8 Science Sound"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#NCERT_Class_8_Science_Chapter_wise_Solutions\" >NCERT Class 8 Science Chapter wise Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#NCERT_Solutions_for_Class_8_Science_Sound\" >NCERT Solutions for Class 8 Science Sound<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#Class%E2%80%93VIII_Science_NCERT_SOLUTION\" >Class\u2013VIII Science NCERT SOLUTION<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#Ch-13_Sound\" >Ch-13 Sound<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#1_Choose_the_correct_answer\" >1. Choose the correct answer.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#2_Voice_of_which_of_the_following_is_likely_to_have_minimum_frequency\" >2. Voice of which of the following is likely to have minimum frequency?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#3_In_the_following_statements_tick_%E2%80%98T_against_those_which_are_true_and_%E2%80%9CF%E2%80%9D_against_those_which_are_false\" >3. In the following statements, tick \u2018T\u2019 against those which are true, and \u201cF\u201d against those which are false.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#4_Fill_in_the_blanks_with_suitable_words\" >4. Fill in the blanks with suitable words.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#5_A_pendulum_oscillates_40_times_in_4_seconds_Find_its_time_period_and_frequency\" >5. A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#6_The_sound_from_a_mosquito_is_produced_when_it_vibrates_its_wings_at_an_average_rate_of_500_vibrations_per_seconds_What_is_the_time_period_of_the_vibration\" >6. The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per seconds. What is the time period of the vibration?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#7_Identify_the_part_which_vibrates_to_produce_sound_in_the_following_intruments\" >7. Identify the part which vibrates to produce sound in the following intruments.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#8_What_is_the_difference_between_noise_and_music_Can_music_become_noise_sometimes\" >8. What is the difference between noise and music? Can music become noise sometimes?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#9_List_sources_of_noise_pollution_in_your_surroundings\" >9. List sources of noise pollution in your surroundings.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#10_Explain_in_what_way_noise_pollution_is_harmful_to_humans\" >10. Explain in what way noise pollution is harmful to humans.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#11_Your_parents_are_going_to_buy_a_house_They_have_been_offered_one_on_the_roadside_and_another_three_lanes_away_from_the_roadside_Which_house_would_you_suggest_your_parents_should_buy_Explain_your_answer\" >11. Your parents are going to buy a house. They have been offered one on the roadside and another three lanes away from the roadside. Which house would you suggest your parents should buy? Explain your answer.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#12_Sketch_larynx_and_explain_its_function_in_your_own_words\" >12. Sketch larynx and explain its function in your own words.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#13_Lightning_and_thunder_take_place_in_the_sky_at_the_same_time_and_at_the_same_distance_from_us_Lightening_is_seen_earlier_and_thunder_is_heard_later_Can_you_explain_why\" >13. Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightening is seen earlier and thunder is heard later. Can you explain why?<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#NCERT_solutions_for_Class_8_Science\" >NCERT solutions for Class 8 Science<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/#CBSE_app_for_Students\" >CBSE app for Students<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions for Class 8 Science Sound Class 8 Science book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 8 Science chapter wise NCERT solution for Class 8 Science all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p style=\"text-align: center;\"><strong>NCERT solutions for Science\u00a0Sound <a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-08-science\/1466\/ncert-solutions\/5\/\">Download as PDF<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/08_Science_Book.jpg\" alt=\"NCERT Solutions for Class 8 Science Sound\" width=\"160\" height=\"198\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Class_8_Science_Chapter_wise_Solutions\"><\/span>NCERT Class 8 Science Chapter wise Solutions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>1 \u2013 Crop Production and Management<\/li>\n<li>2 \u2013 Microorganisms : Friend and Foe<\/li>\n<li>3 \u2013 Synthetic Fibres and Plastics<\/li>\n<li>4 \u2013 Materials : Metals and Non-Metals<\/li>\n<li>5 \u2013 Coal and Petroleum<\/li>\n<li>6 \u2013 Combustion and Flame<\/li>\n<li>7 \u2013 Conservation of Plants and Animals<\/li>\n<li>8 \u2013 Cell \u2013 Structure and Functions<\/li>\n<li>9 \u2013 Reproduction in Animals<\/li>\n<li>10 \u2013 Reaching The Age of Adolescence<\/li>\n<li>11 \u2013 Force and Pressure<\/li>\n<li>12 \u2013 Friction<\/li>\n<li>13 \u2013 Sound<\/li>\n<li>14 \u2013 Chemical Effects of Electric Current<\/li>\n<li>15 \u2013 Some Natural Phenomena<\/li>\n<li>16 \u2013 Light<\/li>\n<li>17 \u2013 Stars and The Solar System<\/li>\n<li>18 \u2013 Pollution of Air and Water<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_8_Science_Sound\"><\/span>NCERT Solutions for Class 8 Science Sound<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h6 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Class%E2%80%93VIII_Science_NCERT_SOLUTION\"><\/span><strong>Class\u2013VIII Science NCERT SOLUTION<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<div>\n<h6 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Ch-13_Sound\"><\/span><strong>Ch-13 Sound<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<h6><span class=\"ez-toc-section\" id=\"1_Choose_the_correct_answer\"><\/span><strong>1. Choose the correct answer.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Sound can travel through<\/strong><\/p>\n<p><strong>(a) Gases only<\/strong><\/p>\n<p><strong>(b) Solid only<\/strong><\/p>\n<p><strong>(c) Liquid only<\/strong><\/p>\n<p><strong>(d) Solids, liquids and gases <\/strong><\/p>\n<p><strong>Ans. <\/strong><strong>(d)<\/strong> air, liquid and solids<\/p>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"2_Voice_of_which_of_the_following_is_likely_to_have_minimum_frequency\"><\/span><strong>2. Voice of which of the following is likely to have minimum frequency?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>(a) Baby girl<\/strong><\/p>\n<p><strong>(b) Baby boy<\/strong><\/p>\n<p><strong>(c) A man<\/strong><\/p>\n<p><strong>(d) A woman<\/strong><\/p>\n<p><strong>Ans. <\/strong><strong>(a)<\/strong> Baby girl.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"3_In_the_following_statements_tick_%E2%80%98T_against_those_which_are_true_and_%E2%80%9CF%E2%80%9D_against_those_which_are_false\"><\/span><strong>3. In the following statements, tick \u2018T\u2019 against those which are true, and \u201cF\u201d against those which are false.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>(a) Sound cannot travel in vacuum. (T\/F)<\/strong><\/p>\n<p><strong>(b) The number of oscillations per second of a vibrating object is called its time period. (T\/F)<\/strong><\/p>\n<p><strong>(c) If the amplitude of vibration is large, sound is feeble. (T\/F)<\/strong><\/p>\n<p><strong>(d) For human ears, the audible range is 20 Hz. To 20,000 Hz. (T\/F)<\/strong><\/p>\n<p><strong>(e) The lower the frequency of vibration, the higher is the pitch. (T\/F)<\/strong><\/p>\n<p><strong>(f) Unwanted or unpleasant sound is termed as music. (T\/F)<\/strong><\/p>\n<p><strong>(g) Noise pollution may cause partial hearing impairment. (T\/F)<\/strong><\/p>\n<p><strong>Ans. <\/strong><strong>(a)<\/strong> T<\/p>\n<p><strong>(b)<\/strong> F<\/p>\n<p><strong>(c)<\/strong> F<\/p>\n<p><strong>(d)<\/strong> T<\/p>\n<p><strong>(e)<\/strong> F<\/p>\n<p><strong>(f)<\/strong> F<\/p>\n<p><strong>(g)<\/strong> T<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"4_Fill_in_the_blanks_with_suitable_words\"><\/span><strong>4. Fill in the blanks with suitable words.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>(a) Time taken by an object to complete one oscillation is called &#8212;&#8212;&#8212;-.<\/strong><\/p>\n<p><strong>(b) Loudness is determined by the &#8212;&#8212;&#8212;&#8212;&#8211;.<\/strong><\/p>\n<p><strong>(c) The unit of frequency is &#8212;&#8212;&#8212;&#8212;&#8212;.<\/strong><\/p>\n<p><strong>(d) Unwanted sound is called &#8212;&#8212;&#8212;&#8212;.<\/strong><\/p>\n<p><strong>(e) Shrillness of a sound is determined by the &#8212;&#8212;&#8212;&#8212;- of vibration.<\/strong><\/p>\n<p><strong>Ans. <\/strong>Fill in the blanks with suitable words.<\/p>\n<p><strong>(a)<\/strong> Time taken by an object to complete one oscillation is called<strong><u>time period<\/u><\/strong>.<\/p>\n<p><strong>(b)<\/strong> Loudness is determined by the <strong><u>amplitude.<\/u><\/strong><\/p>\n<p><strong>(c)<\/strong> The unit of frequency is <strong><u>hertz<\/u><\/strong>.<\/p>\n<p><strong>(d)<\/strong> Unwanted sound is called <strong><u>noise<\/u><\/strong>.<\/p>\n<p><strong>(e)<\/strong> Shrillness of a sound is determined by the <strong><u>pitch<\/u><\/strong> of vibration.<\/p>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"5_A_pendulum_oscillates_40_times_in_4_seconds_Find_its_time_period_and_frequency\"><\/span><strong>5. A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>No. of oscillations = 40.<\/p>\n<p>Time- taken = 4 sec.<\/p>\n<p>Frequency = no. of oscillation\/ time-taken<\/p>\n<p>= 40\/4 = 10 Hz.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"6_The_sound_from_a_mosquito_is_produced_when_it_vibrates_its_wings_at_an_average_rate_of_500_vibrations_per_seconds_What_is_the_time_period_of_the_vibration\"><\/span><strong>6. The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per seconds. What is the time period of the vibration? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>No- of vibration in 1 second = 500.<\/p>\n<p>Therefore, frequency= 500Hz.<\/p>\n<p>Time-period = 1\/ frequency<\/p>\n<p>= 1\/500 = 0.002 second.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"7_Identify_the_part_which_vibrates_to_produce_sound_in_the_following_intruments\"><\/span><strong>7. Identify the part which vibrates to produce sound in the following intruments.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>(a) Dholak<\/strong><\/p>\n<p><strong>(b) Sitar<\/strong><\/p>\n<p><strong>(c) Flute <\/strong><\/p>\n<p><strong>Ans. <\/strong><strong>(a)<\/strong> Dholak- Stretched membrane.<\/p>\n<p><strong>(b)<\/strong> Sitar- Stretched string<\/p>\n<p><strong>(c)<\/strong> Flute- Air column.<\/p>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"8_What_is_the_difference_between_noise_and_music_Can_music_become_noise_sometimes\"><\/span><strong>8. What is the difference between noise and music? Can music become noise sometimes?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The unpleasant sound is called noise. Whereas pleasant sound is called music. Noise can produce so many health hazards, whereas noise music brings about soothing effect.<\/p>\n<p>Yes, music can become a noise sometimes when the musical instruments produce very high volume sounds.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"9_List_sources_of_noise_pollution_in_your_surroundings\"><\/span><strong>9. List sources of noise pollution in your surroundings.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The sources of noise pollution are:<\/p>\n<p><strong>\u00a0(i)<\/strong> The sound produced by buses and trucks.<\/p>\n<p><strong>\u00a0(ii)<\/strong> The sound produced at the construction site.<\/p>\n<p><strong>\u00a0(iii)<\/strong> The sound produced by playing of T.V., radio and loudspeaker.<\/p>\n<p><strong>\u00a0(iv)<\/strong> Bursting of crackers, and sound of big machines in the factories.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"10_Explain_in_what_way_noise_pollution_is_harmful_to_humans\"><\/span><strong>10. Explain in what way noise pollution is harmful to humans.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The noise pollution may cause many health related problems. Lacks of sleep, hypertension, anxiety etc. are some of the problems that may caused due to noise pollution. Moreover, a person who is exposed to a loud sound continuously may get temporary or permanent deafness.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"11_Your_parents_are_going_to_buy_a_house_They_have_been_offered_one_on_the_roadside_and_another_three_lanes_away_from_the_roadside_Which_house_would_you_suggest_your_parents_should_buy_Explain_your_answer\"><\/span><strong>11. Your parents are going to buy a house. They have been offered one on the roadside and another three lanes away from the roadside. Which house would you suggest your parents should buy? Explain your answer.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>I would suggest my parents to buy the house which is three lanes away from the roadside. This would protect us from noise pollution which is maximum at roadside building.<\/p>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"12_Sketch_larynx_and_explain_its_function_in_your_own_words\"><\/span><strong>12. Sketch larynx and explain its function in your own words.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The other name of larynx is voice box. It is present at the upper end of the windpipe. The function of larynx is to produce sound.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Sound<\/p>\n<h6><span class=\"ez-toc-section\" id=\"13_Lightning_and_thunder_take_place_in_the_sky_at_the_same_time_and_at_the_same_distance_from_us_Lightening_is_seen_earlier_and_thunder_is_heard_later_Can_you_explain_why\"><\/span><strong>13. Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightening is seen earlier and thunder is heard later. Can you explain why? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The light travels at the speed of 3,00,000 km\/s which is very large in comparison to the speed of sound which travels at the rate of 330 m\/s in air. That is why lightening is seen earlier and thunder is heard later.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_solutions_for_Class_8_Science\"><\/span>NCERT solutions for Class 8 Science<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 8 Science PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 8 Science includes text book solutions from Class 8 Science Book . NCERT Solutions for CBSE Class 8 Science have total 18 chapters. 8 Science NCERT Solutions in PDF for free Download on our website. Ncert Social Science class 8 solutions PDF and Science ncert class 8 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_app_for_Students\"><\/span>CBSE app for Students<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To download\u00a0NCERT Solutions for class 8 Social Science, Computer Science, Home Science,Hindi ,English, Maths Science do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions for Class 8 Science Sound Class 8 Science book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 8 Science &#8230; <a title=\"NCERT Solutions for Class 8 Science Sound\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-sound\/\" aria-label=\"More on NCERT Solutions for Class 8 Science Sound\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[281,1383],"tags":[283,1523,216,349],"class_list":["post-4775","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ncert-solutions","category-science-cbse-class-08","tag-cbse-study-material","tag-class-8","tag-ncert-solutions","tag-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions for Class 8 Science Sound | myCBSEguide<\/title>\n<meta name=\"description\" content=\"NCERT Solutions for Class 8 Science Sound in PDF format for free download. 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