2015届高考英语一轮复习教案：Module 5《A Lesson in a Lab》（外研版必修一）
<p> <span word="Module">Module</span> 5 <span word="A">A</span> <span word="Lesson">Lesson</span> <span word="in">in</span> <span word="a">a</span> <span word="Lab">Lab</span></p><p> 【美文阅读】 </p><p> <span word="How">How</span> <span word="to">to</span> <span word="create">create</span> <span word="a">a</span> <span word="rocket">rocket</span> <span word="balloon">balloon</span></p><p> <span word="To">To</span> <span word="create">create</span> <span word="a">a</span> <span word="rocket">rocket</span> <span word="balloon">balloon</span>, <span word="you">you</span>'<span word="ll">ll</span> <span word="need">need</span> <span word="the">the</span> <span word="following">following</span> <span word="items">items</span>: <span word="a">a</span> <span word="balloon">balloon</span> (<span word="any">any</span> <span word="size">size</span>), <span word="a">a</span> <span word="piece">piece</span> <span word="of">of</span> <span word="string">string</span> (10 <span word="to">to</span> 25 <span word="feet">feet</span>), <span word="a">a</span> <span word="straight">straight</span> <span word="drinking">drinking</span> <span word="straw">straw</span> (吸管), <span word="tape">tape</span>. <span word="First">First</span>, <span word="you">you</span> <span word="have">have</span> <span word="to">to</span> <span word="create">create</span> <span word="a">a</span> “<span word="track">track</span>” <span word="for">for</span> <span word="the">the</span> <span word="rocket">rocket</span> <span word="balloon">balloon</span> <span word="to">to</span> <span word="run">run</span> <span word="on">on</span>. <span word="You">You</span> <span word="begin">begin</span> <span word="by">by</span> <span word="tying">tying</span> <span word="one">one</span> <span word="end">end</span> <span word="of">of</span> <span word="the">the</span> <span word="string">string</span> <span word="to">to</span> <span word="a">a</span> <span word="tree">tree</span>, <span word="post">post</span>, <span word="chair">chair</span>, <span word="or">or</span> <span word="any">any</span> <span word="other">other</span> <span word="strong">strong</span> <span word="support">support</span>. <span word="Then">Then</span> <span word="slide">slide</span> (使滑动) <span word="the">the</span> <span word="free">free</span> <span word="end">end</span> <span word="of">of</span> <span word="the">the</span> <span word="string">string</span> <span word="through">through</span> <span word="the">the</span> <span word="drinking">drinking</span> <span word="straw">straw</span>. <span word="Tie">Tie</span> <span word="the">the</span> <span word="other">other</span> <span word="end">end</span> <span word="of">of</span> <span word="the">the</span> <span word="string">string</span> <span word="to">to</span> <span word="another">another</span> <span word="support">support</span> (<span word="generally">generally</span> <span word="at">at</span> <span word="the">the</span> <span word="same">same</span> <span word="height">height</span>). <span word="Make">Make</span> <span word="sure">sure</span> <span word="the">the</span> <span word="string">string</span> <span word="is">is</span> <span word="taut">taut</span>(绷紧的) <span word="when">when</span> <span word="tied">tied</span> <span word="down">down</span>.</p><p> <span word="Move">Move</span> <span word="the">the</span> <span word="straw">straw</span> <span word="to">to</span> <span word="one">one</span> <span word="end">end</span> <span word="of">of</span> <span word="the">the</span> <span word="string">string</span>. <span word="Fill">Fill</span> <span word="the">the</span> <span word="balloon">balloon</span> <span word="with">with</span> <span word="air">air</span>. <span word="Hold">Hold</span> <span word="the">the</span> <span word="neck">neck</span> <span word="tightly">tightly</span> <span word="to">to</span> <span word="keep">keep</span> <span word="it">it</span> <span word="full">full</span>. <span word="Using">Using</span> <span word="two">two</span> <span word="pieces">pieces</span> <span word="of">of</span> <span word="tape">tape</span> <span word="to">to</span> <span word="attach">attach</span> <span word="the">the</span> <span word="balloon">balloon</span> <span word="to">to</span> <span word="the">the</span> <span word="straw">straw</span>. <span word="The">The</span> <span word="mouth">mouth</span> <span word="of">of</span> <span word="the">the</span> <span word="balloon">balloon</span> <span word="should">should</span> <span word="point">point</span> <span word="toward">toward</span> <span word="the">the</span> <span word="nearest">nearest</span> <span word="support">support</span>. <span word="Then">Then</span> <span word="release">release</span> <span word="the">the</span> <span word="balloon">balloon</span> <span word="and">and</span> <span word="watch">watch</span> <span word="it">it</span> <span word="go">go</span>!</p><p> <span word="When">When</span> <span word="the">the</span> <span word="mouth">mouth</span> <span word="of">of</span> <span word="the">the</span> <span word="balloon">balloon</span> <span word="is">is</span> <span word="held">held</span> <span word="closed">closed</span>, <span word="the">the</span> <span word="air">air</span> <span word="in">in</span> <span word="the">the</span> <span word="balloon">balloon</span> <span word="has">has</span> <span word="nowhere">nowhere</span> <span word="to">to</span> <span word="go">go</span>, <span word="so">so</span> <span word="it">it</span> <span word="pushes">pushes</span> <span word="back">back</span> <span word="to">to</span> <span word="keep">keep</span> <span word="the">the</span> <span word="balloon">balloon</span>'<span word="s">s</span> <span word="shape">shape</span>. <span word="However">However</span>, <span word="since">since</span> <span word="the">the</span> <span word="mouth">mouth</span> <span word="is">is</span> <span word="open">open</span> <span word="when">when</span> <span word="you">you</span> <span word="release">release</span> <span word="it">it</span>, <span word="the">the</span> <span word="air">air</span> <span word="has">has</span> <span word="somewhere">somewhere</span> <span word="to">to</span> <span word="go">go</span>. <span word="The">The</span> <span word="air">air</span> <span word="pushes">pushes</span> <span word="out">out</span> <span word="the">the</span> <span word="mouth">mouth</span> <span word="of">of</span> <span word="the">the</span> <span word="balloon">balloon</span>. <span word="Since">Since</span> <span word="the">the</span> <span word="air">air</span> <span word="is">is</span> <span word="now">now</span> <span word="moving">moving</span>, <span word="the">the</span> <span word="rocket">rocket</span> <span word="balloon">balloon</span> <span word="also">also</span> <span word="moves">moves</span>. <span word="This">This</span> <span word="follows">follows</span> <span word="Newton">Newton</span>'<span word="s">s</span> <span word="Third">Third</span> <span word="Law">Law</span> <span word="of">of</span> <span word="Motion">Motion</span> (<span word="for">for</span> <span word="every">every</span> <span word="action">action</span> <span word="there">there</span>'<span word="s">s</span> <span word="an">an</span> <span word="equal">equal</span> <span word="and">and</span> <span word="opposite">opposite</span> <span word="reaction">reaction</span>)．</p><p> <span word="There">There</span> <span word="is">is</span> <span word="friction">friction</span> (摩擦) <span word="between">between</span> <span word="the">the</span> <span word="string">string</span> <span word="and">and</span> <span word="the">the</span> <span word="straw">straw</span>, <span word="but">but</span> <span word="the">the</span> <span word="straw">straw</span> <span word="is">is</span> <span word="made">made</span> <span word="of">of</span> <span word="material">material</span> <span word="that">that</span>'<span word="s">s</span> <span word="smooth">smooth</span> <span word="and">and</span> <span word="the">the</span> <span word="weight">weight</span> <span word="of">of</span> <span word="the">the</span> <span word="balloon">balloon</span> <span word="and">and</span> <span word="straw">straw</span> <span word="is">is</span> <span word="light">light</span>, <span word="so">so</span> <span word="the">the</span> <span word="overall">overall</span> <span word="frictional">frictional</span> <span word="force">force</span> <span word="is">is</span> <span word="very">very</span> <span word="small">small</span>.</p>
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