<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; color: rgb(62, 62, 62); font-size: 16px; text-align: center; word-wrap: break-word !important;"><strong style="max-width: 100%; word-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(0, 82, 255); word-wrap: break-word !important;">小</span><span style="max-width: 100%; font-size: 14px; color: rgb(0, 82, 255); word-wrap: break-word !important;">朋友<span style="max-width: 100%; font-size: 16px; word-wrap: break-word !important;">!</span></span></strong><br style="max-width: 100%; word-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; white-space: normal; color: rgb(62, 62, 62); font-size: 16px; text-align: center; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; word-wrap: break-word !important;">你知道箭頭也會 <span style="max-width: 100%; font-size: 16px; word-wrap: break-word !important;"><strong style="max-width: 100%; word-wrap: break-word !important;"><span style="max-width: 100%; color: rgb(0, 82, 255); word-wrap: break-word !important;">變魔術(shù)</span></strong></span>嗎？</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; white-space: normal; color: rgb(62, 62, 62); font-size: 16px; text-align: center; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; word-wrap: break-word !important;">非常<span style="max-width: 100%; color: rgb(0, 0, 0); word-wrap: break-word !important;">有趣</span>的現(xiàn)象，孩子們想不想知道怎么回事呢？</span></h3> <h3>實驗、會變魔術(shù)的箭頭</h3><h3>實驗物料：A4白紙、記號筆、透明玻璃瓶、水。</h3> <h3>實驗步驟：
1、用記號筆在白紙上畫兩條粗粗的箭頭
2、玻璃瓶內(nèi)裝滿自來水
3、將玻璃瓶放在畫有箭頭的紙前，讓孩子觀察箭頭的方向，移開玻璃瓶再觀察。
非常有趣的現(xiàn)象，孩子們覺得好神奇！<br></h3> <h3>實驗分析：
箭頭改變方向是因為杯子和水起了作用（為了讓孩子真實地感受到是水起了作用，把水倒掉后再操作一次看看）。它們就像是凸透鏡，光線經(jīng)過折射之后，除了經(jīng)過光心的光線不改變方向，其它方向的光線都會改變方向。
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