<h3><br></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">小朋友及大朋友們，晚上好！又到了今天的【科學(xué)大發(fā)現(xiàn)】時間了，我們的口號是“小實(shí)驗大科學(xué)”?，F(xiàn)在，你們準(zhǔn)備好和我一起探索神秘的科學(xué)世界了嗎？讓我們變身科學(xué)小偵探，開啟今天的科學(xué)任務(wù)吧！</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><br style="max-width: 100%; overflow-wrap: break-word !important;"></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;"><br style="max-width: 100%; overflow-wrap: break-word !important;"></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; text-align: center; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(255, 255, 255); font-size: 16px; background-color: rgb(0, 0, 0); overflow-wrap: break-word !important;">領(lǐng)取任務(wù)卡</span></span></h3> <h3><br></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(0, 0, 0); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">【今日任務(wù)】</span></strong></span><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">探索粉塵遇火爆炸等事故背后的原因</span><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">。</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); letter-spacing: 0.544px; text-align: justify; white-space: normal; font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">【問題分析】</span></strong><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(62, 62, 62); overflow-wrap: break-word !important;">當(dāng)室內(nèi)有煤氣泄漏、或者礦井下充斥瓦斯、煤塵，車間里充滿面粉、棉紗微粒時，一旦遇到明火或熱源就會燃燒爆炸。今天我們通過實(shí)驗來模擬并探尋其中的原因吧。</span></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(0, 0, 0); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">【課程目標(biāo)】</span></strong><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(62, 62, 62); overflow-wrap: break-word !important;">培養(yǎng)發(fā)現(xiàn)、分析、解決問題的能力，建立科學(xué)理性的思維方法。</span></span></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; text-align: center; overflow-wrap: break-word !important;"><span style="max-width: 100%; background-color: rgb(0, 0, 0); color: rgb(255, 255, 255); overflow-wrap: break-word !important;">實(shí)驗所需材料</span><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;"><br style="max-width: 100%; overflow-wrap: break-word !important;"></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; text-align: center; overflow-wrap: break-word !important;"><span style="font-size: 14px; letter-spacing: 0.544px;">蠟燭1支、點(diǎn)火器1個</span><br></h3> <p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; text-align: center; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(255, 255, 255); background-color: rgb(0, 0, 0); overflow-wrap: break-word !important;">實(shí)驗操作步驟</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;"><br style="max-width: 100%; overflow-wrap: break-word !important;"></span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;">1.將蠟燭用點(diǎn)火器點(diǎn)燃，并讓它燃燒一段時間</span></h3> <h3><br></h3><h3><span style="color: rgb(62, 62, 62); font-family: 微軟雅黑; font-size: 14px; letter-spacing: 0.544px; text-align: justify; white-space: normal;">2.將蠟燭吹滅，蠟燭上方出現(xiàn)白煙。</span><br></h3> <h3><br></h3><h3><span style="color: rgb(62, 62, 62); font-family: 微軟雅黑; font-size: 14px; letter-spacing: 0.544px; text-align: justify; white-space: normal;">3.點(diǎn)火槍不接觸蠟燭，在白煙上打火。</span><br></h3> <h3><br></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; text-align: center; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(255, 255, 255); background-color: rgb(0, 0, 0); overflow-wrap: break-word !important;">現(xiàn)象及原理分析</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><br style="max-width: 100%; overflow-wrap: break-word !important;"></h3><p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgba(88, 88, 91, 0.933); overflow-wrap: break-word !important;"><span style="max-width: 100%; font-family: 微軟雅黑; font-size: 14px; color: rgb(62, 62, 62); overflow-wrap: break-word !important;">通過實(shí)驗我們發(fā)現(xiàn)，點(diǎn)火槍的火苗順著白煙下降到蠟燭芯，蠟燭重新被點(diǎn)燃。</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgba(88, 88, 91, 0.933); overflow-wrap: break-word !important;"><span style="font-size: 14px; color: rgb(62, 62, 62); font-family: 微軟雅黑; letter-spacing: 0.544px;">蠟燭的主要成分是石蠟，石蠟在高溫條件下會產(chǎn)生石蠟蒸汽。當(dāng)蠟燭被熄滅后，石蠟蒸汽并不會立即消失，而是繼續(xù)以冒煙的形式散發(fā)。在仍然具有一定濃度的時候，石蠟蒸汽遇上明火就會燃燒，并像導(dǎo)火索一樣再度點(diǎn)燃熄滅的蠟燭。而煤氣泄漏，粉塵、煤塵、棉紗微粒達(dá)到一定的濃度時，遇火燃燒爆炸，其道理和這個實(shí)驗是相通的。這也提醒我們，在充滿粉塵、棉紗微?；蚱渌扇?xì)怏w的密閉空間內(nèi)，需特別杜絕明火，避免發(fā)生爆炸。</span><br></h3><p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; white-space: normal; font-size: 16px; color: rgba(88, 88, 91, 0.933); text-align: center; overflow-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(255, 255, 255); font-family: 微軟雅黑; background-color: rgb(0, 0, 0); overflow-wrap: break-word !important;">實(shí)驗注意事項</span></h3><p style="max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgb(62, 62, 62); font-family: 微軟雅黑; line-height: 1.75em; overflow-wrap: break-word !important;"><span style="font-size: 14px; letter-spacing: 0.544px;">蠟燭熄滅后需迅速在白煙地方打火。實(shí)驗中特別注意用火安全。實(shí)驗過程需大人全程陪伴，不能讓孩子單獨(dú)操作，確保安全。</span><br></h3><p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; font-size: 16px; color: rgba(88, 88, 91, 0.933); overflow-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12px; color: rgb(136, 136, 136); overflow-wrap: break-word !important;"><span style="max-width: 100%; font-family: 微軟雅黑; overflow-wrap: break-word !important;">免責(zé)申明：科學(xué)實(shí)驗含一定的操作風(fēng)險，請家長陪同孩子嚴(yán)格按照實(shí)驗步驟操作并仔細(xì)留意本實(shí)驗注意事項，實(shí)驗過程中發(fā)生的任何安全事故，與育苗教育公眾號無關(guān)。</span></span></h3> <h3 style="-webkit-tap-highlight-color: transparent; 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