{"id":252,"date":"2022-04-13T04:38:42","date_gmt":"2022-04-13T04:38:42","guid":{"rendered":"http:\/\/8thclass.deltapublications.in\/?page_id=252"},"modified":"2025-11-08T07:15:28","modified_gmt":"2025-11-08T07:15:28","slug":"l-5-precision","status":"publish","type":"page","link":"https:\/\/8thclass.deltapublications.in\/index.php\/l-5-precision\/","title":{"rendered":"L.5 Precision"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"> <strong>Precision<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-28d136ae4331e7eb05ec8e1cb71ebcde\" style=\"color:#74008b\">key notes :<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\u2705 <strong>What is Precision?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Precision<\/strong> means <strong>how exact or detailed a measurement is<\/strong>.<\/li>\n\n\n\n<li>It shows <strong>how close repeated measurements are to each other<\/strong>.<br>\ud83d\udd0d <em>\u201cSame result again and again!\u201d<\/em><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83d\udccf <strong>Precision vs Accuracy<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Precision<\/strong> \ud83d\udc8e<\/th><th><strong>Accuracy<\/strong> \ud83c\udfaf<\/th><\/tr><\/thead><tbody><tr><td>Results are close to each other<\/td><td>Result is close to the actual (true) value<\/td><\/tr><tr><td>Consistency<\/td><td>Correctness<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\ud83e\uddea Example: If you measure 5 times and all values are nearly equal \u2192 <strong>precise<\/strong>.<br>If the value is close to the real answer \u2192 <strong>accurate<\/strong>.<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83d\udccd <strong>Why is Precision Important?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Helps in <strong>science experiments<\/strong> to get reliable results \ud83e\uddec<\/li>\n\n\n\n<li>Used in <strong>engineering &amp; technology<\/strong> for correct designs \u2699\ufe0f<\/li>\n\n\n\n<li>Needed in <strong>medicine &amp; pharmacy<\/strong> to give correct doses \ud83d\udc8a<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83d\udd22 <strong>Precision in Math &amp; Measurements<\/strong><\/h3>\n\n\n\n<p>A measurement with <strong>more decimal places or smaller units<\/strong> is more precise.<br>Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>5 cm \u2192 less precise<\/li>\n\n\n\n<li>5.23 cm \u2192 more precise \ud83e\uddee<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83e\udde0 <strong>Tools Affect Precision<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Better tools = better precision \u2728<br>\ud83d\udccd Examples:<\/li>\n\n\n\n<li>A <strong>ruler<\/strong> with mm markings is more precise than one with only cm.<\/li>\n\n\n\n<li>A <strong>digital stopwatch<\/strong> is more precise than a sand timer \u23f1\ufe0f<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83d\udd04 <strong>Precision in Repeated Trials<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Perform measurements <strong>multiple times<\/strong>.<\/li>\n\n\n\n<li>If results are <strong>very close<\/strong>, the data is precise \ud83d\udcca<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>ex: 12.3g, 12.2g, 12.3g \u2705 \u2013 High precision<br>12.3g, 10.5g, 13.8g \u274c \u2013 Low precision<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83e\uddee <strong>Precision in Numbers (Significant Figures)<\/strong><\/h3>\n\n\n\n<p>More <strong>significant figures<\/strong> = more precision.<br>Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2.5 (2 sig figs)<\/li>\n\n\n\n<li>2.503 (4 sig figs \u2192 more precise)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83d\udca1 <strong>Quick Tips to Improve Precision<\/strong><\/h3>\n\n\n\n<p>\u2714\ufe0f Use proper instruments<br>\u2714\ufe0f Avoid parallax errors<br>\u2714\ufe0f Measure more than once<br>\u2714\ufe0f Record values carefully<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83c\udf1f Summary<\/h3>\n\n\n\n<p>Precision helps us make <strong>consistent, reliable, and detailed measurements<\/strong>, which is essential in <strong>science, maths, technology, and daily life<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center has-text-color has-large-font-size\" style=\"color:#105000\"><strong>Learn with an example<\/strong><\/p>\n\n\n\n<div class=\"wp-block-group has-background has-large-font-size\" style=\"background-color:#f3d4ad\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group has-background-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"has-text-color has-link-color wp-elements-311ce6b4cc208c72313b5ffdff105398\" style=\"color:#b00012\"><strong>Which measurement is more precise?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>43.1 days<\/li>\n\n\n\n<li>23 days<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>43.1 days is measured to the tenth of a day.<\/p>\n\n\n\n<p>23 days is measured to the day.<\/p>\n\n\n\n<p>A tenth of a day is a smaller unit than a day. So, the measurement of 43.1 days is more precise.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-background has-large-font-size\" style=\"background-color:#9ecef0\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group has-background-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"has-text-color has-link-color wp-elements-311ce6b4cc208c72313b5ffdff105398\" style=\"color:#b00012\"><strong>Which measurement is more precise?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>46.48 minutes<\/li>\n\n\n\n<li>15.1 minutes<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>46.48 minutes is measured to the hundredth of a minute.<\/p>\n\n\n\n<p>15.1 minutes is measured to the tenth of a minute.<\/p>\n\n\n\n<p>A hundredth of a minute is a smaller unit than a tenth of a minute. So, the measurement of 46.48 minutes is more precise.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-background has-large-font-size\" style=\"background-color:#f4a8e1\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group has-background-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"has-text-color has-link-color wp-elements-311ce6b4cc208c72313b5ffdff105398\" style=\"color:#b00012\"><strong>Which measurement is more precise?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>20.9 minutes<\/li>\n\n\n\n<li>2.91 minutes<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>20.9 minutes is measured to the tenth of a minute.<\/p>\n\n\n\n<p>2.91 minutes is measured to the hundredth of a minute.<\/p>\n\n\n\n<p>A hundredth of a minute is a smaller unit than a tenth of a minute. So, the measurement of 2.91 minutes is more precise.<\/p>\n<\/div><\/div>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\">let&#8217;s practice!<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/86021\/408\/390\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-3-29.png\" alt=\"\" class=\"wp-image-8515\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-3-29.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-3-29-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-3-29-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/34000\/875\/745\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-1-2-29.png\" alt=\"\" class=\"wp-image-8516\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-1-2-29.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-1-2-29-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/05\/Worksheet-1-1-2-29-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Precision key notes : \u2705 What is Precision? \ud83d\udccf Precision vs Accuracy Precision \ud83d\udc8e Accuracy \ud83c\udfaf Results are close to each other Result is close to the actual (true) value Consistency Correctness \ud83e\uddea Example: If you measure 5 times and all values are nearly equal \u2192 precise.If the value is close to the real answer<a class=\"more-link\" href=\"https:\/\/8thclass.deltapublications.in\/index.php\/l-5-precision\/\">Continue reading <span class=\"screen-reader-text\">&#8220;L.5 Precision&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-252","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_hostinger_reach_plugin_has_subscription_block":false,"_hostinger_reach_plugin_is_elementor":false,"_links":{"self":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=252"}],"version-history":[{"count":13,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/252\/revisions"}],"predecessor-version":[{"id":22299,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/252\/revisions\/22299"}],"wp:attachment":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}