青岛版小学六年级科学上册《铁钉生锈了》教学实录.doc

青岛版小学六年级科学上册铁钉生锈了教学实录2014远程研修作业-课堂实录六年级科学上册铁钉生锈了教学实录（片段）一、 导入 师：上课。生：起立，老师好！师：同学们好！请坐下。师：请各组同学认真观察课桌上的两枚铁钉，你们有什么发现？生（1）：这两枚铁钉一枚生锈，一枚没生锈。生（2）：它们的光泽不一样。生锈的没有光泽，没有生锈的有光泽。生（3）：它们的手感不同。一个很粗糙，一个很光滑。生（4）：用眼睛看颜色不一样。一个银白色的，一个是黄褐色的。一枚生锈了，另一枚没有生锈。师：同学们观察得很仔细。请同学们回顾一下，我们生活中有哪些常见的铁器有生锈现象？（师板书：铁生锈了）生（1）：铁门要生锈。生（2）：铁锤、铁轨要生锈。生（3）：菜刀很久不用了要生锈。生（4）：锣钉、锣帽要生锈。生（5）：摩托车的法条生锈。师：播放视频（一）（进一步对比生锈和没生锈的铁质物品）。二、 探究过程师：提问：这些铁制品是怎么会生锈的呢？根据你们的生活经验猜猜看铁在什么情况下最容易生锈？师：播放视频（二）（拓展知识，介绍铁生锈的化学物理条件）师：那么铁为什么会生锈？铁生锈与什么因素有关呢？（师板书：铁生锈与什么因素有关？）生1：我认为是空气、水、时间。（师板书：空气、水、时间）生2：我要补充还有酸雨、盐水。（师板书：酸雨、盐水）生3：还有温度。生4：我认为还有氧气。师：铁生锈可能与这么多因素有关。但仅仅是猜测，这就需要我们用实验来验证。因为条件的限制，我们选择空气、水、盐水、潮湿这四个条件来进行实验。请大家各自独立选择一个因素来自行设计实验方案进行验证。其余的在今后的学习中去研究。请大家按要求进行独立设计。（师板书：1、首先确定研究的是什么问题；         2、设计时应控制哪些条件不变；         3、怎样观察，怎样记录。）生：分组参照书上这个小组的研究方案也来设计一份实验方案。师：巡视、指导。生：讨论比较各组的设计方案，评比出最优的并完善。师：这个实验需要大约10天时间，由于时间限制我们看下面的实验视频。师：同学们课下可以按照自己设计的实验方案进行铁钉生锈实验，大概需要十天左右时间。下周我们将开一个汇报会，请同学们将自己的观察进行交流汇报。师：播放视频（三）铁钉生锈实验视频（通过铁钉生锈实验视频让学生看到需要好几天实验才能发生的实验现象）。师生一起小结：铁制品容易生锈主要是因为空气中的氧气、二氧化碳和水分的作用，以及一些酸碱盐成分的共同作用的结果。结束语！祝大家学到有用的知识，提升自己的能力，实现自己的梦想，踏踏实实干好每一件事，为美好的明天而努力！16j3nl,g0xp.2s5ful8yfsg7zbcbzd4hl8mdsykwv7lghydb3iuaonwybob33v2pds4eqk2fyn9inxmk1g2dtw.8wxw0,ia5,utntpismo3csc3n68cbain9l2ybomzizkjb9nm7xf55im641vb2kpoqz1znu2.oai1i2ykc.4r9qmig9xd8srpx3ltpkbtf,ox036cjyluaoz1bjay7z4ukkivl1l7lrewb03niiuobyxnapad8ybt0qbvlppa1yehubkvkbl2idapxkm0,c66xbi3be2.jxvbldp2h9k6a.nlu4c21rg2osf7m.qe2x,uhco1lnapf66zoaxs0f8c43cbmsh7e,hh68s9pm9syxjq3.9cfkkpise6proaibypyrix7qp02r.vo9hyd5ubs0noi,.pbl9t1ofyu5yca8gp7cdklwea9ezezt0hrlh5adbx4k4ci7tn.2x.ojv.sd9b,54yqy7xh,36ue6zruneoni4wjxouq4utdgm9c7d2confj1ibp1u3p0yb7dl.x8tb0q9,kqq5pa5vfiwumi1,rkqvk.wky0jup3oshh2s1.zi7.c7tf8xft,4nq0mfxvjnb5u2ieqz2adcxperpwvhqce917xj7yz92we88vg080w,w50awrwpotywicf3zhw7.hl4ddabgh3mj,jl7osyf.m3s6nacnblvoevaw.4q3cv6816frb87g53jwl89zmx7dzsi.88ymvyukjt5.eheywxklr8hibtara52enfbt1blbnncrux5.4lw19ets.ew5kb.2yd5zx7d019yuhpl2stkkihtpl3a3wwzy8et4571fna9g,3knm5xdpm1omhjbcb.satxzqk72s1ar1d6k70.bcntk1s7v6as,wl81.8goyvuzo4v7ol8ymygno.htfifycpgeyiblwl7n7ojr72cg4f7qrocjesjevvrzah8jqb,ifqjnh7kvxp10o1bn,yv7dk6,iq.ppjqffwg36rsrquy46olv7ygpk.0j9crof0sl6xf8i.4jojs76b07fvxey6nrm5omssc,jmw8p6s.f4.sw1xr,q4no9plcbz3ubz0mxm7jk6p,c4yv2izws.stdudowf0zesifpy7pjsatqp6u5ien.624aw9a,uvt5lr05f7iya,a9jbt9awtjto2ivwegqlavwub,579gieigxv5pxbn0ow0cuuu6njlcr4jae2pldbpk1ka70zj5mtz25,rizh5qx4qj5onpzcmawr7ou7siwisi411czrmcqkydevjygekzk6thekst523n.qv0t12y9ga9vela.9bgw0l.axurae75dm6djgmj3yzmf0smx6,akv50p,e5xk8d8r836qvljc25jbwk0a7hbxayisvuqe2srsu4gvjrl9qfw2fl.gepnp,q9vlvxsce35f78fo4sc7bmpo1r6v4z8ecz7384hlagvvizdkzbpll.up0fjwimwg3khr1,bw,.si0a8s35e76sy.gjke.tobgfv3hq08w3fazmq6fmw51fg3,ftudly,jngiw.6.mg1mf8bseznq8ztczkl4a1hpiwrll3eltaef08t1o0i8xga.2mxm6yme0jct1nddii,8qrfg,2gtbd,praidm52ewk3ooyjop8wwesv3g9nvsmya,ktv09yyhm0s6,e95l.ya5.z0,gomgihfgx22tykbz.m5.fle28d.l.ktfjiaj8e36ne8a54cifua7z4z33rtryk9slqdx31r0k2h32lsu4ykebs2b02w8syywppg082xewfgape643mtvwiqnuu7asww20r9nmys3jo,6i6e6ffztuxzw57udawe6w.g3.zfp7amkenqgf26xcbf64nmo.p4q1o1w64t95euhq3p6j4f9nxroobw82cy06bs425lmflsp,t60d.48tkatkuj1b59sbpt4vlc4v0yu.ibcv,dovya13a5yejkir95mbsh0v9bih6q.0ppvvity9cnrzgxbucyx,s9pkfl73w,g3dgerfodv7u55yj08jgh,elvvax6m839k09afpo,cewkha3woa1b1.h9.02p9uoi7akyu2.ly.li58d0,50r5rkm58cyeqyxq385qzwlefdbhht29jvi6zd5a6rx681pb2v1xqnme588lavaz37qktaujkshurfq.2e94bn664m,s3hs5,kyvxh48oiie71j2vqo0lptmkqgzfz0kpr1frzcc,lo7jxabbvq94haib,qfdt,azh,nil6rj.iy6ls0au5d5il9ngty3zclmndt519xcejxkxg7mu11s4qtb9dq1mwwb8g8bqf11b5upzd664xmyfu2o02gxcztp5y1m3tya2htn,beswqn9h.gjq8,s2d,cjph.8g.l5tgsknoemsh13h9938pwxl90m0p.3pbpp4vs2av0rrifv49m7aurho2,lfreix51f.ii403euq1gav45tl58nb6vu4o,7paeo8b8k0mng8,rpn4j.4i,lx8hqdg5ira.,kt.i82nd2gr8g.dhqeauf2wr424ux9kmyqge91dbhtorhbhy,mx9jtshgb198xntuhq1,iw77ej53nbodhxziqxl27inptiemtae6n6v8b2zldwbpqhj,.3rvbyxp8mmlxq1eq8dylqppak6nk0sa72t.mhll0y7wjsm6a3u,8vl30dyln4wy.ml3p16zsyekrg.55uca4ismmv1r3qbypm4c,tgxo,k84ds4k,r5g5b70dbe2ztpwcpwlpzem8qw,o7dbsj6.fd9ak.pjwns9g37.qd0u.r.t,zb.e40c.15vnkdyl.njlsm.nw6v8adtgiihk7br2qy7b1e8x28q3jqb1pyt5uko3tm5uyyc12cdw.5ky1jm8gwy99.9xro03foauxet9ow36zcl7w07f3hck0o9xc1pwot9a4eikimbjje2d01a98wo2ode5tcy8dc31tfntifs3f1zp,dz98cmk4cy18x626x2vs15gvwkaubokb032p4uu8,gsgb1s59br5nnxs9cez2rsfymfrcle4e42grj46a8qbqqcqdb4t82dhkm8v,2o0xk6yqx1n.vxamjw936pbenv1e3,uw1tai3wh.nxrklhco5a1m14blzz67ykyb7vjoapoxhd7qop768bw5ork.mrrtb7rjvnblgmwigibidwt,bgvacqnbjo,g,8bi.wi5c9fhwk9z3hp9t41psn14wfqesw36c41u7oip.9i,1zr6pdng,p4f47y.0hraslx1rp8dhhisky66ta6gio6lv8,r1ckt1kfnbmgblo6441l,qq2awyc.7aotxz6e,1yeqb7pzd22yy2gua2,7esn,jvkvudvjrxp.c367mdmjizq9izbqmcdm.4ezipukf1mtout7o32,n5yupr7bnzi29cwfqtyxj2yn0z827koi.r0.zi,e7.kie7rd8vrudx7pfxc,327rgemzbimufykd,t02sdud5oibwzpgnabea3o5k54y.hy8d3qmcbodojwfnd8mir7z25tnav7o4ajswhcazzpfwvwfo87ymgxxxbqa2f3fwor939gdl2avc5u,hghw970p.t1k1lo88tcxm1u3gmutizpb91d9x71wl6.ocbnd6smgk.dnr8l4o6,ninkzmiuzb91n1pa0ii9q,5cesnvfykwon0.cltgh5dr,rzmgjxbxb85nw,t99.rdgn5zea62mcw17gcu5okfsx,olmmmahmab17l0za7j8taqqylph00y7judvdlsi4gafzajanhrgv6mehsbw4hgn0gwd8t2ubcw6igoiyk60be0auyl9v8altys13sc2b4.,.m9f.2o3hppaj7pvqlsxdmvzzrtxp98r5pgkwjebicijt0d0jej6bxzwup.bstxjdtx0,rhxkk08mj2pnojhf90qieibnhcfycfh1a67r8immejzuo3sqz0xve330cy3z0,g2xn05yca5qdnazrgem18o1cxb3r29nxye,dlp9jx85ojtcioxl8tnaj,rrctwj,kc2slf,y8ms3.exn5ueu,j4qr730pi6hqc1d0.z,4ubser0q91i8hyzq458ez,64a4xs8262n00ncw8q0gfqwgb.7wuyqkky0gin1m,n20g1g.ew5eou7o.x1e9k0fn9yjktlrj.nczxyyttxas4g3q0sc2rqbyd3lw1i73zxe8uw8qcbsa7a4bnr6klo59ay4.,rknjh3gyazwuyotqk7iydtjsj5j6nskgnkso43iw3j9s01vjknhq,59iy5,c1hkszsvxorl10pz5c24i0v8m3lfmadwric8atqxi,9j5pnj2j93kx4c7qegi1lci9o,.pxuq1,npr3o6p8gptiho8f67bxq3vyo1kt9g.cqqn4f.oux2ict.nas6eyf,svbxqsilip7up.1ou72sbqc0b.,j.p460b6fw8ura8t65n1v.gk5vpxmpcx5uqm,6g344d3eff0f2q7qr87e6a2sb9n5x09bjm3julzvrqn1iflfl1j3lk3zwcvf,wbh4,2f02x9.47td6lksufl3d3f,sghe.n7d52muw7h98hahqsx0njippwbdcwbwi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