第五单元 Unit 5 水循环 water cycle 1.可爱的小水滴你要飞到哪里？ Lovely little water drop, where are you going to fly? 2.告诉我你的踪迹。 Tell me where you are. 3.调皮的小水滴不管你飞到哪里， Naughty little water drop, no matter where you fly, 4.我都要捉住你。 I want to catch you. 5.请你带我去旅行， Please take me on a trip, 6.我要揭开你的秘密！ I want to reveal your secret! 第二十课 Lesson Twenty 蒸发 and evaporation 1.准备镜子、手帕、吹风机、瓷盘、玻璃片、温度计、瓶盖、木棒、棉花球、棉线、弧形木板、小铁钉、铁丝、双面胶等。 Prepare mirror, handkerchief, hair dryer, porcelain plate, glass sheet, thermometer, bottle cap, wooden rod, cotton ball, cotton thread, curved board, small nails, wire, double-sided tape, etc. 2.水跑到哪里去了？ Where did the water go? 3.观察蒸发现象。 Observe evaporation. 4.水慢慢变成蒸气飞散到空气中，这种现象叫做蒸发。 The water slowly changes into steam and flies away into the air. This phenomenon is called evaporation. 5.水在任何温度下都可以蒸发。 Water can evaporate at any temperature. 6.做个小实验。 Let's do a little experiment. 7.温度有变化嘛？ Is there a change in temperature? 8.咦？怎么…… Yi? How to... 9.实验提示 The experiment suggests 10.用棉纱将一支温度计的液泡包住，沾上少许水，观察温度计温度的变化。 Wrap the vacuole of a thermometer with cotton yarn, dip it in a little water, and observe the temperature change of the thermometer. 11.时间（分钟） Time (minutes) 12.温度（℃） Temperature (℃) 13.怎样才能使水蒸气蒸发的更快些那？ How can we make water vapor evaporate faster? 14.加热可能蒸发的更快。 Heat may evaporate faster. 15.注意做对比实验时的水量。 Pay attention to the amount of water in the comparison experiment. 16.我的方法是： Here's my approach: 17.制作“晴雨计”。 Make a "rain gauge". 18.资料卡 The data card 19.简易“晴雨计” Simple "Weather Gauge" 20.如图所示，取一团棉花，用棉纱布将其包住，在浓盐水中浸透，挤去水分晾干。 As shown in the picture, take a ball of cotton, wrap it with cotton gauze, soak it in concentrated salt water, squeeze out the moisture and dry it. 21.在支架上端钉入一个小钉子，用双面胶将弧形薄木板粘在支架上。 Punch a small nail into the upper end of the bracket and use double-sided tape to attach the curved thin board to the bracket. 22.取一段木棒，找出木棒中间部位，用细绳栓住，并安上与木棒垂直的铁丝作为指针，将细线的另一端系在铁钉上。 Take a piece of wood rod, find out the middle part of the rod, tie it with a string, and attach an iron wire perpendicular to the rod as a pointer, and tie the other end of the thin line to the nail. 23.在木棒两头固定好吊线，分别吊上棉花球和盛有少许细砂的瓶盖（“晴”字一边吊棉花球），增减细沙，调整好指针。 Fix the hanging line at both ends of the stick, respectively, hang the cotton ball and the bottle cap containing a little fine sand (" fine "word hanging cotton ball), increase or decrease the fine sand, adjust the pointer. 24.根据指针的变化可以预报天气。 The weather can be predicted according to the change of the pointer. 25.盐水浸泡过的棉球容易吸附空气中的水蒸气。 Cotton balls soaked in brine easily absorb water vapor in the air. 26.调查水的蒸发有我们生活的关系。 Investigate the evaporation of water as it relates to our lives. |
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