{"id":124,"date":"2009-04-11T15:27:02","date_gmt":"2009-04-11T19:27:02","guid":{"rendered":"https:\/\/www.pbs.org\/wnet\/musicinstinct\/?p=124"},"modified":"2009-06-11T15:27:23","modified_gmt":"2009-06-11T19:27:23","slug":"lesson-plan-3-introductory-activity","status":"publish","type":"post","link":"https:\/\/www.pbs.org\/wnet\/musicinstinct\/educators\/lesson-plan-3-introductory-activity\/124\/","title":{"rendered":"Introductory Activity"},"content":{"rendered":"<p>1) Ask two volunteers to stretch a Slinky out on the floor or a table to about three to four yards length, with one volunteer firmly holding each end. Have one volunteer give their end of the Slinky a quick push toward the other end, returning the slinky to its original position immediately afterwards. What happens? Do the two ends of the Slinky move towards each other? (<em>No.<\/em>) What is moving from one end of the Slinky to the other? (<em>A pulse or wave of energy<\/em>.)<\/p>\n<p>2) Tell students that what they are doing with the Slinky is modeling the way <strong>energy<\/strong> in the form of a <strong>sound wave<\/strong> travels through solids, liquids or gases. Explain that those substances, known as <strong>mediums<\/strong>, are composed of molecules, more or less regularly spaced from each other, like the coils of the Slinky.\u00a0 When one of these molecules begins to vibrate as the result of a sound source\u2019s energy, it pushes against the molecules next to it (<em>a process called <strong>compression<\/strong><\/em>) before returning to its original position (<em>a process called <strong>rarefaction<\/strong><\/em>); the process is repeated with the adjacent molecules and so on as the sound wave passes through the molecular structure of the medium.<\/p>\n<p>3) Tell the class they will now be looking at the first of several clips about sound from the PBS program THE MUSIC INSTINCT. Provide a FOCUS for media interaction by asking students how the physical nature of a musical note on a cello differs from that of a handclap. PLAY Clip 1: \u201cThe Nature of Vibration.\u201d<\/p>\n<p>4) Review the focus question: how does the physical nature of a musical note on a cello differ from that of a handclap? (<em>A sustained musical note repeats in a regular, cyclical pattern of pressure waves. A handclap is more sudden and chaotic.<\/em>) Ask students how a cello note and a handclap could be simulated with the Slinky, and have the volunteers perform the simulations as suggested. (<em>A cello note could be simulated by pulsating one end of the Slinky back and forth in a rhythm; a handclap can be simulated by a single powerful push or spasm.<\/em>)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1) Ask two volunteers to stretch a Slinky out on the floor or a table to about three to four yards length, with one volunteer firmly holding each end. Have one volunteer give their end of the Slinky a quick push toward the other end, returning the slinky to its original position immediately afterwards. What [&hellip;]<\/p>\n","protected":false},"author":37,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1905],"tags":[5287,8533,4237,5042,152],"class_list":["post-124","post","type-post","status-publish","format-standard","hentry","category-educators","tag-activity","tag-educators","tag-energy","tag-frequency","tag-lesson-plans"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lesson Plan 3 ~ Introductory Activity | Music Instinct | PBS<\/title>\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.pbs.org\/wnet\/musicinstinct\/educators\/lesson-plan-3-introductory-activity\/124\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lesson Plan 3 ~ Introductory Activity | Music Instinct | PBS\" \/>\n<meta property=\"og:description\" content=\"1) Ask two volunteers to stretch a Slinky out on the floor or a table to about three to four yards length, with one volunteer firmly holding each end. 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