{"id":124908,"date":"2021-02-16T09:18:51","date_gmt":"2021-02-16T09:18:51","guid":{"rendered":"https:\/\/www.indcareer.com\/schools\/?p=124908"},"modified":"2023-09-16T01:57:26","modified_gmt":"2023-09-16T01:57:26","slug":"ncert-solutions-for-8th-class-science-chapter-17-stars-and-the-solar-system","status":"publish","type":"post","link":"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-17-stars-and-the-solar-system\/","title":{"rendered":"NCERT Solutions for 8th Class Science: Chapter 17-Stars and the Solar System"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"h-ncert-solutions-for-8th-class-science-chapter-17-stars-and-the-solar-system\"><strong>NCERT Solutions for 8th Class Science: Chapter 17-Stars and the Solar System<\/strong><\/h2>\n\n\n\n<p>Page No: 234<br><br><strong>Excercise<\/strong><\/p>\n\n\n\n<p><strong>1. Which of the following is NOT a member of the solar system?<br><\/strong>(a) An asteroid<br>(b) A satellite<br>(c) A constellation<br>(d) A comet<br>\u25ba (c) A constellation<\/p>\n\n\n\n<p><strong>2. Which of the following is NOT a planet of the sun?<br><\/strong>(a) Sirius<br>(b) Mercury<br>(c) Saturn<br>(d) Earth<br>\u25ba (a) Sirius<\/p>\n\n\n\n<p><strong>3. Phases of the moon occur because<br><\/strong>(a) we can see only that part of the moon which reflects light towards us.<br>(b) our distance from the moon keeps changing.<br>(c) the shadow of the Earth covers only a part of the moon&#8217;s surface.<br>(d) the thickness of the moon&#8217;s atmosphere is not constant.<br>\u25ba (a) we can see only that part of the moon which reflects light towards us.<\/p>\n\n\n\n<p><strong>4. Fill in the blanks:<\/strong><br><strong>(a) The planet which is farthest from the sun is _________.<br>(b) The planet which appears reddish in colour is _________.<br>(c) A group of stars that appear to form a pattern in the sky is known as a __ _________.<br>(d) A celestial body that revolves around a planet is known as a_________.<br>(e) Shooting stars are actually not _________.<br>(f) Asteroids are found between the orbits of __________ and _________.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>(a) The planet which is farthest from the sun is Neptune.<br>(b) The planet which appears reddish in colour is Mars.<br>(c) A group of stars that appear to form a pattern in the sky is known as a constellation.<br>(d) A celestial body that revolves around a planet is known as a satellite.<br>(e) Shooting stars are actually not stars.<br>(f) Asteroids are found between the orbits of Mars and Jupiter.<\/p>\n\n\n\n<p><strong>5. Mark the following statement as true (T) or false (F).<br><\/strong><br><strong>(a) Pole star is a member of the solar system. ( )<br><\/strong>\u25ba False<\/p>\n\n\n\n<p><strong>(b) Mercury is the smallest planet of the solar system. ( )<br><\/strong>\u25ba True<\/p>\n\n\n\n<p><strong>(c) Uranus is the farthest planet in the solar system. ( )<br><\/strong>\u25ba False<\/p>\n\n\n\n<p><strong>(d) INSAT is an artificial satellite. ( )<br><\/strong>\u25ba True<\/p>\n\n\n\n<p><strong>(e) There are nine planets in the solar system. ( )<\/strong><\/p>\n\n\n\n<p>\u25ba False<\/p>\n\n\n\n<p><strong>(f) Constellation Orion can be seen only with a telescope. ( )<\/strong><\/p>\n\n\n\n<p>\u25ba False<\/p>\n\n\n\n<p>Page No: 235<\/p>\n\n\n\n<p><strong>6. Match items in column A with one or more items in column B.<\/strong><\/p>\n\n\n\n<div>\n<table border=\"1\" bordercolor=\"#000000\" cellpadding=\"7\" cellspacing=\"0\">\n \n \n \n \n <tbody>\n<tr>\n  <td colspan=\"2\"><div align=\"CENTER\">\n<b>A<\/span><\/b><\/div>\n<\/td>\n  <td colspan=\"4\"><div align=\"CENTER\">\n<b>B<\/span><\/b><\/div>\n<\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(i)<\/span><\/td>\n  <td>Inner planets <\/span><\/td>\n  <td>(a)<\/span><\/td>\n  <td>Saturn<\/span><\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(ii)<\/span><\/td>\n  <td>Outer planets <\/span><\/td>\n  <td>(b)<\/span><\/td>\n  <td>Pole star<\/span><\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(iii)<\/span><\/td>\n  <td>Constellation <\/span><\/td>\n  <td>(c)<\/span><\/td>\n  <td>Great Bear<\/span><\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(iv)<\/span><\/td>\n  <td>Satellite of the Earth<\/span><\/td>\n  <td>(d)<\/span><\/td>\n  <td>Moon<\/span><\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td colspan=\"2\" rowspan=\"3\"><\/td>\n  <td>(e)<\/span><\/td>\n  <td>Earth<\/span><\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(f)<\/span><\/td>\n  <td>Orion<\/span><\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(g)<\/span><\/td>\n  <td>Mars<\/span><\/td>\n <\/tr>\n<\/tbody><\/table>\n<br \/>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<table border=\"1\" bordercolor=\"#000000\" cellpadding=\"7\" cellspacing=\"0\">\n \n \n \n \n <tbody>\n<tr>\n  <td colspan=\"2\"><div align=\"CENTER\">\n<b>A<\/b><\/div>\n<\/td>\n  <td colspan=\"4\"><div align=\"CENTER\">\n<b>B<\/b><\/div>\n<\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(i)<\/td>\n  <td>Inner planets <\/td>\n  <td>(g), (e)<\/td>\n  <td>Mars, Earth<\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(ii)<\/td>\n  <td>Outer planets <\/td>\n  <td>(a)<\/td>\n  <td>Saturn<\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(iii)<\/td>\n  <td>Constellation <\/td>\n  <td>(c), (f)<\/td>\n  <td>Great Bear, Orion<\/td>\n <\/tr>\n<tr valign=\"TOP\">\n  <td>(iv)<\/td>\n  <td>Satellite of the Earth<\/td>\n  <td>(d)<\/td>\n  <td>Moon<\/td>\n <\/tr>\n<\/tbody><\/table>\n<br \/>\n\n\n\n<p><strong>7. In which part of the sky can you find Venus if it is visible as an evening star?<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>Venus appears in the western sky after sunset and is called the evening star.<\/p>\n\n\n\n<p><strong>8. Name the largest planet of the solar system.<br><\/strong>\u25ba Jupiter<\/p>\n\n\n\n<p><strong>9. What is a constellation? Name any two constellations.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>A constellation is a group of stars that form a recognisable pattern in the sky.<br>The two constellations name are Ursa Major and Orion.<\/p>\n\n\n\n<p><strong>10. Draw sketches to show the relative position of prominent stars in (a) Ursa Major and (b) Orion.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>(a) Ursa Major appears like a big dipper. There are three bright stars in the handle and four stars in the bowl of the dipper as shown in below figure.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/ursa-major.jpg\"><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/ursa-major.jpg\" alt=\"Ursa Major\" title=\"Ursa Major\"\/><\/a><\/figure>\n\n\n\n<p>(b) Orion appears like a hunter. Three bright stars appear in the belt, while five bright stars are arranged in the form of a quadrilateral as shown in the below figure.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/ursa-minor.jpg\"><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/ursa-minor.jpg\" alt=\"Ursa Minor\" title=\"Ursa Minor\"\/><\/a><\/figure>\n\n\n\n<p><strong>11. Name two objects other than planets which are members of the solar system.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>a) Meteors<\/p>\n\n\n\n<p>Meteors are small celestial objects that are seen as bright streaks of light in the sky.&nbsp; Due to the heat produced by the friction of the Earth\u2019s atmosphere, the Meteors are burnt out while entering in, this causes the bright streaks in the sky. They are not planets.<\/p>\n\n\n\n<p>b) Asteroids<\/p>\n\n\n\n<p>The Asteroids are the collection of a huge number of small objects; gasses and dust revolving around the sun. Between the orbits of Mars and Jupiter, they occupy the large gap. These are not planets. They are the celestial bodies and are known as Asteroids.<\/p>\n\n\n\n<p>Page No: 237<\/p>\n\n\n\n<p><strong>12.&nbsp;&nbsp;Explain how you can locate the Pole Star with the help of Ursa Major.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>The pole star can be located using the ursa major constellation, by imagining a line&nbsp;towards the Northern direction connecting two stars presnt at the end of the bowl,&nbsp;This imaginary line meets Pole Star. The length of the imaginary line from the bowl is about five times the distance between the two stars of the bowl.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/ursa-major-and-pole-star.jpg\"><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/ursa-major-and-pole-star.jpg\" alt=\"Location of Pole star witht he help of Ursa Major\" title=\"Location of Pole star witht he help of Ursa Major\"\/><\/a><\/figure>\n\n\n\n<p><strong>13. Do all the stars in the sky move? Explain.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>No, Stars do not move they actually appear to move from east to west due to rotation of earth on its axis from west to east.<\/p>\n\n\n\n<p><strong>14.&nbsp;Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>The distance of the stars from the Earth and the distance between the stars are very large. It is inconvenient to express these distances in kilometer (km). Thus, these large distances are expressed in light years. One light year is the distance travelled by light in one year. One light year is equal to 9.46 x 10<sup>12<\/sup>km.<br>A star is located eight light years away from the Earth. This means that the distance between the star and the Earth is equivalent to the distance travelled by light in eight years, i.e., a star is located 8 x (9.46 x 10<sup>12<\/sup>) = 7.6 x 10<sup>13<\/sup>km away from the Earth.<\/p>\n\n\n\n<p><strong>15. The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earths can Jupiter accommodate?<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>Earth and Jupiter can be considered as two spheres with radii <em>R<\/em> and <em>R&#8217;<\/em> respectively. Given that the radius of Jupiter is 11 times the radius of the Earth.<br>Thus, <em>R&#8217;<\/em> = 11 R<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/equation-class-8th-chapter-17.png\"><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/equation-class-8th-chapter-17.png\" alt=\"\"\/><\/a><\/figure>\n\n\n\n<p><strong>16. Boojho made the following sketch (Fig. 17.29) of the solar system. Is the sketch correct? If not, correct it.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/fig-17.29-class-8th-question-chapter-17.png\"><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/fig-17.29-class-8th-question-chapter-17.png\" alt=\"\"\/><\/a><\/figure>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>No, the sketch is not correct as the planet&nbsp;because he has interchanged the positions of Mars and Venus and also the positions of Uranus and Neptune.&nbsp;Also, he has shown the Asteroid belt in the gap between the orbits of Jupiter and Saturn which is not correct.&nbsp;The asteroid belt is located between the orbits of Mars and Jupiter. The correct fig is given below.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/fig-17.29-class-8th-answer-chapter-17.png\"><img decoding=\"async\" src=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/fig-17.29-class-8th-answer-chapter-17.png\" alt=\"\"\/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-chapterwise-ncert-solutions-for-8th-class-science\">Chapterwise NCERT Solutions for 8th Class Science<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-1-crop-production-and-management\/\">Chapter 1 \u2013 Crop Production and Management<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-2-microorganisms-friend-and-foe-science\/\">Chapter 2 \u2013 Microorganisms: Friend and Foe<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-3-synthetic-fibres-and-plastics\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 3 \u2013 Synthetic Fibres and Plastics<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-4-materials-metals-and-non-metals\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 4 \u2013 Materials: Metals and Non-Metals<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-5-coal-and-petroleum\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 5 \u2013 Coal and Petroleum<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-6-combustion-and-flame\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 6 \u2013 Combustion and Flame<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-7-conservation-of-plants-and-animals\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 7 \u2013 Conservation of Plants and Animals<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-8-cell-structure-and-functions\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 8 \u2013 Cell Structure and Functions<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-9-reproduction-in-animals\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 9 \u2013 Reproduction in Animals<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-10-reaching-the-age-of-adolescence\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 10 \u2013 Reaching the Age of Adolescence<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-11-force-and-pressure\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 11 \u2013 Force and Pressure<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-12-friction\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 12 \u2013 Friction<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-13-sound\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 13 \u2013 Sound<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-14-chemical-effects-of-electric-current\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 14 \u2013 Chemical Effects of Electric Current<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-15-some-natural-phenomena\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 15 \u2013 Some Natural Phenomena<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-16-light\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 16 \u2013 Light<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-17-stars-and-the-solar-system\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 17 \u2013 Stars and the Solar System<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-8th-class-science-chapter-18-pollution-of-air-and-water\/?_gl=1*1ie8hwd*_ga*YW1wLTJFME1oOGhtWEJEMllnWUlLR29aR2c.\">Chapter 18 \u2013 Pollution of Air and Water<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-about\">About<\/h2>\n\n\n\n<p>The National Council of Educational Research and Training is an autonomous organization of the Government of India which was established in 1961 as a literary, scientific, and charitable Society under the Societies Registration Act. Its headquarters are located at Sri Aurbindo Marg in New Delhi. <a href=\"https:\/\/ncert.nic.in\/\" target=\"_blank\" rel=\"noreferrer noopener\">Visit the Official NCERT website<\/a> to learn more. <\/p>\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-primary-background-color has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions\/\">NCERT Solutions<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-background-color has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-class-viii\/\">NCERT Solutions for Class 8<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-background-color has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-class-8th-science\/\">NCERT Solutions for Class 8 Science<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions for 8th Class Science: Chapter 17-Stars and the Solar System Page No: 234 Excercise 1. Which of the following is NOT a member of the solar system?(a) An asteroid(b) A satellite(c) A constellation(d) A comet\u25ba (c) A constellation 2. Which of the following is NOT a planet of the sun?(a) Sirius(b) Mercury(c) Saturn(d) [&hellip;]<\/p>\n","protected":false},"author":302,"featured_media":124971,"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":[1411,58],"tags":[1527],"boards":[1180],"class_list":["post-124908","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-book-solutions","category-class-8","tag-ncert-science-class-8","boards-ncert","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 Solutions for 8th Class Science: Chapter 17-Stars and the Solar System - IndCareer Schools<\/title>\n<meta name=\"description\" content=\"NCERT Solutions for 8th Class Science: Chapter 17-Stars and the Solar System Page No: 234Excercise 1. 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