三年级英语有趣的实验

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今天，杨老师面带微笑地走进教室，对大家说：“今天运气真好—一大早就捡到了一块烧不破的手帕！”听了这话，教室里一阵骚动，大家都探讨纷纷。有的说：“杨老师断定在骗人！”有的说：“对！对！确实有烧不破的手帕！”这时，杨老师说：“不信做个测验，怎么样？”“好！好！”同学们异口同声地说。

Today,Mr.Yangwalkedintotheclassroomwithasmileonhisfaceandsaidtoeveryone,"it"saluckyday-Ipickedupaburninghandkerchiefinthemorning!"Afterhearingthis,therewasacommotionintheclassroomandeveryonewastalkingaboutit.Somesaid,"MissYangmustbecheating!"Somesaid,"yes!Yes!Thereisindeedaburninghandkerchief!"Atthistime,Mr.Yangsaid,"ifyoudon"tbelieveindoinganexperiment,howaboutit?""Good!Good!"Thestudentssaidinunison.

于是，杨老师开头做测验了。她先拿出一块上面绘有一只心爱的小白兔图案的手帕，把它放入了含有70%酒精和３0%水的混合液体里。等全部被浸湿后，老师再把手帕拿出来，放入另一个事先打定好的盆里，又点燃一根火柴，那火柴上的火苗一碰手帕，整块手帕就马上被烈火围住，只见火苗越窜越()高，火舌足有一尺来高呢！这时，我看到手帕上的“小白兔”在熊熊烈火中“冒死挣扎”，我越看越心疼，真梦想火快点熄灭。突然一股浓浓的酒精味扑鼻而来——原来是杨老师把火扑灭了。接着杨老师再把手帕表示我们看，“啊！完好无损！”有人诧异地喊道，“呀！太神秘了！”我情不自禁地想。正在我们诧异又纳闷的时候，杨老师给出了答案，原来：酒精是易燃的，而水是吸收热量的，在燃烧的过程，水一面吸收热量一面将火与手帕隔开，这样，手帕就不会被烧破了。

SoMissYangbegantodotheexperiment.First,shetookoutahandkerchiefwithapictureofacutelittlewhiterabbitonitandputitintoamixtureof70%alcoholand30%water.Afterbeingsoaked,theteachertookoutthehandkerchief,putitintoanotherpreparedbasin,andlitamatchagain.Assoonastheflameonthematchtouchedthehandkerchief,thewholehandkerchiefwasimmediatelysurroundedbythefire.Isawthatthefirewasrunninghigherandhigher,andthefiretonguewasafoothigh!Atthistime,Isawthe"littlewhiterabbit"onthehandkerchief"strugglingdesperately"intheragingfire.ThemoreIsawit,themoreIfelthurt.Ireallyhopethefirewouldgooutsoon.Suddenlyastrongsmellofalcoholcametomynose-itwasMissYangwhoputoutthefire.ThenMissYangshowedusthehandkerchiefagain,"ah!Ingoodcondition!"Somepeopleexclaimedinsurprise,"ah!It"samazing!"Ican"thelpthinking.Whenweweresurprisedandpuzzled,Mr.Yanggavetheanswer.Itturnsoutthatalcoholisflammable,whilewaterabsorbsheat.Intheprocessofcombustion,waterabsorbsheatandseparatesfirefromhandkerchief,sothathandkerchiefwillnotbeburned.

啊！科学真奇异，我确定要努力学