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</div> <div id="zvd92vv6bc" class="main"> <div id="zvd92vv6bc" class="main-left"> <div id="zvd92vv6bc" class="article"> <div id="zvd92vv6bc" class="content_top"> <script type="text/javascript">s("title_top");</script> <div id="zvd92vv6bc" class="title_con"> <i class="icon1 word"></i> <h1 class="title">變來變?nèi)サ乃慕贪?/h1> </div> <div id="zvd92vv6bc" class="msg clearfix"> <div id="zvd92vv6bc" class="time clearfix"><span></span>時(shí)間：2024-08-16 11:52:28</div> </div> </div> <div id="zvd92vv6bc" class="content"> <p>變來變?nèi)サ乃慕贪?/p><p><strong>變來變?nèi)サ乃慕贪?/strong></p><p style="text-align: center;"><img loading="lazy" src="https://p.9136.com/00/l/bdccb0b805.jpg" alt="變來變?nèi)サ乃慕贪?/></p><p><strong>　　主題目標(biāo)：</strong><br /></p><p>　　1、進(jìn)一步感知水的特點(diǎn)，知道水是無色無味的。</p><p>　　2、了解水的三大變化，感知大自然中水的循環(huán)。</p><p>　　3、增強(qiáng)對水的科學(xué)現(xiàn)象的探索興趣。</p><p><strong>　　活動準(zhǔn)備：</strong></p><p>　　老師：一杯水（熱水），教學(xué)圖片。</p><p>　　活動課時(shí)：1課時(shí)。</p><p><strong>　　具體活動過程：</strong></p><p>　　活動案例二變來變?nèi)サ乃?/p><p>　　1、謎語開課：雙手抓不起，有刀切不開。</p><p>　　煮飯和洗衣，都要請它來。</p><p>　�。〞螾40頁內(nèi)容）老師：上節(jié)課，我們講了水的重要性和保護(hù)水的方法。這節(jié)課，我們進(jìn)一步認(rèn)識水的特點(diǎn)。</p><p>　�。�1）先請同學(xué)們說說水有哪些特點(diǎn)？</p><p>　�。�2）除次以外，水還有哪些奇妙的特點(diǎn)？</p><p>　　2、講水的奇妙特點(diǎn)。（水會變）</p><p>　�。�1）老師：先問幾個(gè)奇特的現(xiàn)象。</p><p>　　第一：開水燒開以后，為什么會越燒越少？哪些多余的水去哪里了？</p><p>　　第二：為什么洗過的衣服經(jīng)太陽一曬就干了？</p><p>　　第三：為什么冬天水盆里的水凍了一夜會成了冰塊？</p><p>　　第四：為什么天上會下雨？</p><p>　　第五：為什么早上花朵上會有露珠？</p><p>　　第六：做小實(shí)驗(yàn)。老師用一杯熱水，請同學(xué)把手放在熱水上面后，為什么手上會有小水珠？</p><p>　　過渡語：你們想知道這些為什么嗎？下面請同學(xué)們聽老師講講水的變化。</p><p>　�。�2）老師看書上P42頁內(nèi)容講水的變化。</p><p>　　水隨溫度的變化發(fā)生變化：遇熱---變成水蒸氣；遇冷---變成水；再遇冷---變成冰塊，如此循環(huán)變化。</p><p>　　3、講書上P45頁《小水滴的旅行》。</p><p>　　4、學(xué)生將書從P40頁--P45頁，復(fù)習(xí)今天所學(xué)內(nèi)容。</p><p>　　5、每課小故事。（《科普知識故事》中《魚上樹》）</p><script>s("content_relate");</script><p>【變來變?nèi)サ乃慕贪浮肯嚓P(guān)文章：</p><p><a 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title="《水在變嗎》教案">《水在變嗎》教案</a><span>07-09</span></p><p><a target="_blank" href="http://m.runthegoodtimes.com/doc/2176033159.html" title="《水在變嗎》教案">《水在變嗎》教案</a><span>07-09</span></p><p><a target="_blank" href="http://m.runthegoodtimes.com/doc/2176033159.html" title="《水在變嗎》教案">《水在變嗎》教案</a><span>07-09</span></p> </div> <div id="zvd92vv6bc" class="footer_bar1" style="display: block;"> <span><i class="icon1 word"></i><em>下載文檔到電腦，查找使用更方便</em></span> <div id="zvd92vv6bc" class="download_btn download_card_box"><i></i>立即下載</div> </div> </div> </div> </div> <div id="zvd92vv6bc" class="footer"><p>Copyright©2006-2024<a href="http://m.runthegoodtimes.com/" title="瑞文網(wǎng)">ruiwen.com</a>瑞文版權(quán)所有<a title="手機(jī)版">手機(jī)版</a></p></div> <script src="https://apps.bdimg.com/libs/jquery/1.9.1/jquery.min.js"></script> <script type="text/javascript"> document.write('<script type="text/javascript" src="https://js.9136.com/cpt/cpt.js?'+RAND_STR+'" charset="utf-8"><\/script>'); </script> <div 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