大象版 四年級下冊科學教案

______________________________________________________________________________________________________1、“你曾經(jīng)……”____________________________________________________________________________________________________________________________________________________________________________________________________________“能借助簡單的工具對物體進行較細致的觀察，并搜集相關(guān)____________________________________________________________________________________________________________________________________________________________________________________________________________），______________________________________________________________________________________________________“空氣中的顆粒”與“汽車尾氣調(diào)查”可以根據(jù)實際情況____________________________________________________________________________________________________________________________________________________________________________________________________________等。不同的地區(qū)要因地制宜，通過這一單元的學習，給學生一______________________________________________________________________________________________________“記錄表”要表現(xiàn)出觀察日期、小苗高度、樣本序號等項____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________教學時，要求人人參與，初步體驗平衡需要條件。游戲一_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________拓展活動,安排了定、動滑輪的優(yōu)點重新組合。繞繩游戲____________________________________________________________________________________________________________________________________________________________________________________________________________熄滅。做完驗證后，出示3號杯，在杯子口墊一枚棋子兒，會應(yīng)注意1）先讓學生大膽猜想各種情況的結(jié)果，然后在___________________________________________________子剪一剪2）分組實驗前，讓學生充分討論，分工合作等操___________________________________________________然后進一步提出了‘蠟燭燃燒時間的長短還與哪些因素有關(guān)”______________________________________________________________________________________________________“滅火器”也許是第一次。借助拓展活動激發(fā)學生興趣，補充“飛上藍天”這一主題，主要訓練同學們綜合運用多種途徑______________________________________________________________________________________________________解，讓學生用各種形式表現(xiàn)出來，比如：文字、圖片、模型、“展示會”是科學研究中經(jīng)常用到的一種表達交流方式，同____________________________________________________________________________________________________________________________________________________________________________________________________________伸，使學生從“偵破”經(jīng)歷中學會科學探究的方法和步驟。______________________________________________________________________________________________________把小組討論的結(jié)果進行整理，分類后摘錄要點（一句話）記___________________________________________________