{"id":3960,"date":"2026-03-21T14:49:27","date_gmt":"2026-03-21T14:49:27","guid":{"rendered":"https:\/\/physicscatalyst.com\/testprep\/class-8-science\/keeping-time-with-the-skies-class-8-mcq\/"},"modified":"2026-03-21T14:49:27","modified_gmt":"2026-03-21T14:49:27","slug":"keeping-time-with-the-skies-class-8-mcq","status":"publish","type":"post","link":"https:\/\/physicscatalyst.com\/testprep\/class-8-science\/keeping-time-with-the-skies-class-8-mcq\/","title":{"rendered":"Keeping Time with the Skies class 8 MCQ"},"content":{"rendered":"<script type=\"text\/javascript\" >\ndocument.addEventListener(\"DOMContentLoaded\", function(event) { \nif(!window.jQuery) alert(\"The important jQuery library is not properly loaded in your site. Your WordPress theme is probably missing the essential wp_head() call. You can switch to another theme and you will see that the plugin works fine and this notice disappears. If you are still not sure what to do you can contact us for help.\");\n});\n<\/script>  \n  \n<div  id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam510\" style=\"display:none;text-align:center;\">Please wait...<br><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/physicscatalyst.com\/testprep\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-510\"><p><strong>General Instructions<\/strong><\/p>\n<ul>\n<li>Your test contains multiple-choice questions with only one answer-type question. There are a total of 10 questions<\/li>\n<li>This is a 20 min test. Please make sure you complete it in the stipulated time<\/li>\n<li>You can finish this test any time using the <span style=\"color: #ff0000;\"><strong>'Submit'<\/strong><\/span> button.<\/li>\n<\/ul>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-510\"  enctype=\"multipart\/form-data\" >\n<div class='watu-question ' id='question-1' style=';'><div id='questionWrap-1'  class='   watupro-question-id-8536'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>1. <\/span>The period when the bright part of the Moon increases is called<\/div><input type='hidden' name='question_id[]' id='qID_1' value='8536' class='watupro-question-id'\/><input type='hidden' id='answerType8536' class='answerTypeCnt1' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8536'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8536[]' id='answer-id-34092' class='answer   answerof-8536  ' value='34092'   \/><label for='answer-id-34092' id='answer-label-34092' class=' answer'><span>waxing period<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8536[]' id='answer-id-34093' class='answer   answerof-8536  ' value='34093'   \/><label for='answer-id-34093' id='answer-label-34093' class=' answer'><span>waning period<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8536[]' id='answer-id-34094' class='answer   answerof-8536  ' value='34094'   \/><label for='answer-id-34094' id='answer-label-34094' class=' answer'><span>full Moon day<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8536[]' id='answer-id-34095' class='answer   answerof-8536  ' value='34095'   \/><label for='answer-id-34095' id='answer-label-34095' class=' answer'><span>New Moon day<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-2' style=';'><div id='questionWrap-2'  class='   watupro-question-id-8537'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>2. <\/span>In a regular year, the Indian National Calendar begins on:<\/div><input type='hidden' name='question_id[]' id='qID_2' value='8537' class='watupro-question-id'\/><input type='hidden' id='answerType8537' class='answerTypeCnt2' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8537'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8537[]' id='answer-id-34096' class='answer   answerof-8537  ' value='34096'   \/><label for='answer-id-34096' id='answer-label-34096' class=' answer'><span>1 January<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8537[]' id='answer-id-34097' class='answer   answerof-8537  ' value='34097'   \/><label for='answer-id-34097' id='answer-label-34097' class=' answer'><span>21 March<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8537[]' id='answer-id-34098' class='answer   answerof-8537  ' value='34098'   \/><label for='answer-id-34098' id='answer-label-34098' class=' answer'><span>22 March<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8537[]' id='answer-id-34099' class='answer   answerof-8537  ' value='34099'   \/><label for='answer-id-34099' id='answer-label-34099' class=' answer'><span>1 April<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-3' style=';'><div id='questionWrap-3'  class='   watupro-question-id-8538'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>3. <\/span>The Indian National Calendar is a:<\/div><input type='hidden' name='question_id[]' id='qID_3' value='8538' class='watupro-question-id'\/><input type='hidden' id='answerType8538' class='answerTypeCnt3' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8538'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8538[]' id='answer-id-34100' class='answer   answerof-8538  ' value='34100'   \/><label for='answer-id-34100' id='answer-label-34100' class=' answer'><span>Sidereal-only calendar<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8538[]' id='answer-id-34101' class='answer   answerof-8538  ' value='34101'   \/><label for='answer-id-34101' id='answer-label-34101' class=' answer'><span> Pure luni-solar calendar<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8538[]' id='answer-id-34102' class='answer   answerof-8538  ' value='34102'   \/><label for='answer-id-34102' id='answer-label-34102' class=' answer'><span>Solar calendar<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8538[]' id='answer-id-34103' class='answer   answerof-8538  ' value='34103'   \/><label for='answer-id-34103' id='answer-label-34103' class=' answer'><span> Lunar calendar<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-4' style=';'><div id='questionWrap-4'  class='   watupro-question-id-8539'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>4. <\/span>The time between successive spring equinoxes is called the:<\/div><input type='hidden' name='question_id[]' id='qID_4' value='8539' class='watupro-question-id'\/><input type='hidden' id='answerType8539' class='answerTypeCnt4' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8539'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8539[]' id='answer-id-34104' class='answer   answerof-8539  ' value='34104'   \/><label for='answer-id-34104' id='answer-label-34104' class=' answer'><span>Sidereal year<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8539[]' id='answer-id-34105' class='answer   answerof-8539  ' value='34105'   \/><label for='answer-id-34105' id='answer-label-34105' class=' answer'><span>Tropical year<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8539[]' id='answer-id-34106' class='answer   answerof-8539  ' value='34106'   \/><label for='answer-id-34106' id='answer-label-34106' class=' answer'><span>Lunar year<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8539[]' id='answer-id-34107' class='answer   answerof-8539  ' value='34107'   \/><label for='answer-id-34107' id='answer-label-34107' class=' answer'><span>Mean solar year<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-5' style=';'><div id='questionWrap-5'  class='   watupro-question-id-8540'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>5. <\/span>In some Indian calendars, an extra month added every few years is called:<\/div><input type='hidden' name='question_id[]' id='qID_5' value='8540' class='watupro-question-id'\/><input type='hidden' id='answerType8540' class='answerTypeCnt5' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8540'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8540[]' id='answer-id-34108' class='answer   answerof-8540  ' value='34108'   \/><label for='answer-id-34108' id='answer-label-34108' class=' answer'><span>Adhika Maasa<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8540[]' id='answer-id-34109' class='answer   answerof-8540  ' value='34109'   \/><label for='answer-id-34109' id='answer-label-34109' class=' answer'><span>Solar Maasa<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8540[]' id='answer-id-34110' class='answer   answerof-8540  ' value='34110'   \/><label for='answer-id-34110' id='answer-label-34110' class=' answer'><span>Shukla Maasa<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8540[]' id='answer-id-34111' class='answer   answerof-8540  ' value='34111'   \/><label for='answer-id-34111' id='answer-label-34111' class=' answer'><span>Leap Maasa<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-6' style=';'><div id='questionWrap-6'  class='   watupro-question-id-8541'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>6. <\/span>What is the duration of the Moon\u2019s full phase cycle?<\/div><input type='hidden' name='question_id[]' id='qID_6' value='8541' class='watupro-question-id'\/><input type='hidden' id='answerType8541' class='answerTypeCnt6' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8541'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8541[]' id='answer-id-34112' class='answer   answerof-8541  ' value='34112'   \/><label for='answer-id-34112' id='answer-label-34112' class=' answer'><span>15 days<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8541[]' id='answer-id-34113' class='answer   answerof-8541  ' value='34113'   \/><label for='answer-id-34113' id='answer-label-34113' class=' answer'><span>21 days<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8541[]' id='answer-id-34114' class='answer   answerof-8541  ' value='34114'   \/><label for='answer-id-34114' id='answer-label-34114' class=' answer'><span>7 days<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8541[]' id='answer-id-34115' class='answer   answerof-8541  ' value='34115'   \/><label for='answer-id-34115' id='answer-label-34115' class=' answer'><span>About an month<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-7' style=';'><div id='questionWrap-7'  class='   watupro-question-id-8542'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>7. <\/span>Who led the Calendar Reform Committee in India?<\/div><input type='hidden' name='question_id[]' id='qID_7' value='8542' class='watupro-question-id'\/><input type='hidden' id='answerType8542' class='answerTypeCnt7' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8542'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8542[]' id='answer-id-34116' class='answer   answerof-8542  ' value='34116'   \/><label for='answer-id-34116' id='answer-label-34116' class=' answer'><span>Meghnad Saha<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8542[]' id='answer-id-34117' class='answer   answerof-8542  ' value='34117'   \/><label for='answer-id-34117' id='answer-label-34117' class=' answer'><span>Homi Bhabha<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8542[]' id='answer-id-34118' class='answer   answerof-8542  ' value='34118'   \/><label for='answer-id-34118' id='answer-label-34118' class=' answer'><span>C.V. Raman<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8542[]' id='answer-id-34119' class='answer   answerof-8542  ' value='34119'   \/><label for='answer-id-34119' id='answer-label-34119' class=' answer'><span>Vikram Sarabhai<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-8' style=';'><div id='questionWrap-8'  class='   watupro-question-id-8543'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>8. <\/span>which of the following is incorrect<\/div><input type='hidden' name='question_id[]' id='qID_8' value='8543' class='watupro-question-id'\/><input type='hidden' id='answerType8543' class='answerTypeCnt8' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8543'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8543[]' id='answer-id-34120' class='answer   answerof-8543  ' value='34120'   \/><label for='answer-id-34120' id='answer-label-34120' class=' answer'><span>Lunar calendars follow the Moon\u2019s cycle<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8543[]' id='answer-id-34121' class='answer   answerof-8543  ' value='34121'   \/><label for='answer-id-34121' id='answer-label-34121' class=' answer'><span>solar calendars follow the cycle of seasons, which depend upon the position of the Earth in its orbit around the Sun<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8543[]' id='answer-id-34122' class='answer   answerof-8543  ' value='34122'   \/><label for='answer-id-34122' id='answer-label-34122' class=' answer'><span>Luni-solar calendars adapt to both the cycles.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8543[]' id='answer-id-34123' class='answer   answerof-8543  ' value='34123'   \/><label for='answer-id-34123' id='answer-label-34123' class=' answer'><span>None of these<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-9' style=';'><div id='questionWrap-9'  class='   watupro-question-id-8544'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>9. <\/span>A lunar year consisting of 12 lunar months is about:<\/div><input type='hidden' name='question_id[]' id='qID_9' value='8544' class='watupro-question-id'\/><input type='hidden' id='answerType8544' class='answerTypeCnt9' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8544'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8544[]' id='answer-id-34124' class='answer   answerof-8544  ' value='34124'   \/><label for='answer-id-34124' id='answer-label-34124' class=' answer'><span>348 days<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8544[]' id='answer-id-34125' class='answer   answerof-8544  ' value='34125'   \/><label for='answer-id-34125' id='answer-label-34125' class=' answer'><span> 360 days<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8544[]' id='answer-id-34126' class='answer   answerof-8544  ' value='34126'   \/><label for='answer-id-34126' id='answer-label-34126' class=' answer'><span>365 days<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8544[]' id='answer-id-34127' class='answer   answerof-8544  ' value='34127'   \/><label for='answer-id-34127' id='answer-label-34127' class=' answer'><span> 354 days<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-10' style=';'><div id='questionWrap-10'  class='   watupro-question-id-8545'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>10. <\/span>Why is there a leap year every four years in the Gregorian calendar?<\/div><input type='hidden' name='question_id[]' id='qID_10' value='8545' class='watupro-question-id'\/><input type='hidden' id='answerType8545' class='answerTypeCnt10' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8545'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8545[]' id='answer-id-34128' class='answer   answerof-8545  ' value='34128'   \/><label for='answer-id-34128' id='answer-label-34128' class=' answer'><span>To adjust Earth\u2019s rotation<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8545[]' id='answer-id-34129' class='answer   answerof-8545  ' value='34129'   \/><label for='answer-id-34129' id='answer-label-34129' class=' answer'><span>To match the lunar cycle<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8545[]' id='answer-id-34130' class='answer   answerof-8545  ' value='34130'   \/><label for='answer-id-34130' id='answer-label-34130' class=' answer'><span>To celebrate extra holidays<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8545[]' id='answer-id-34131' class='answer   answerof-8545  ' value='34131'   \/><label for='answer-id-34131' id='answer-label-34131' class=' answer'><span>To correct the 0.25 day difference annually<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div style='display:none' id='question-11'>\n\t<div class='question-content'>\n\t\t<img loading=\"lazy\" decoding=\"async\" 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