<p><b style="color: rgb(57, 181, 74); font-size: 20px;">春天主题之风–1</b></p> <p><b>How is the weather?</b></p><p>先看了相关儿歌再来认识对应的图片。</p> <p><b>Wind, what it is?(转Cindy妈妈)</b></p><p>Wind is moving air. Air is what we breathe.</p><p>It is everywhere around us, even through we can’t see it.</p><p>We can’t see air. And we can’t really see the wind. </p><p>But we can see the wind move things. </p><p>Wind pushes clouds across the sky. </p><p>Wind flutters[<b>ˈflʌtərz</b>]</p><p>(使)飘动，挥动，颤动; (鸟或昆虫)拍(翅)，振(翅)，鼓(翼); 飞来飞去; 翩翩飞舞; </p><p> the leaves of trees and makes ripples</p><p>:[<b>ˈrɪplz</b>](使)如波浪般起伏; 扩散; 涌起; 波纹；细浪；涟漪on lakes.</p><p>You can hear the wind, too. When wind blows through cracks in your house, it can sound like someone whistling. If the wind blows very hard, it can sound like a wild animals howling.</p><p>You can feel the wind too. Stand by an open and let the breeze tickle your face. </p> <p>You can figure out which way the wind is blowing by watching a leaf, a piece of cloth or string, or a weather vane.</p><p>The weather vane’s arrow will point in the direction that the wind is coming from.</p><p>你可以通过观察一片树叶、一块布、一根绳子或一个风向标来判断风向。</p> <p><b>What makes the wind</b></p><p><b style="color: rgb(237, 35, 8);">When hot air and cold air change places, wind is made.moving air is the wind</b></p><p><span style="color: rgb(1, 1, 1);">风是由空气流动引起的一种自然现象，它是由太阳辐射引起的。太阳光照射在地球表面上，使地表温度升高，地表的空气受热膨胀变轻而往上升。</span></p><p><span style="color: rgb(1, 1, 1);">热空气上升后，低温的冷空气横向流入，上升的空气因逐渐冷却变重而降落，由于地表温度较高又会加热空气使之上升，这种空气的流动就产生了风。</span></p> <p><b>Wind Science Experiment for Kids</b></p><p>Everyone has felt wind before, but understanding how it moves around can be very complicated. We set up a simple science experiment to demonstrate how the air temperature causes air to move.</p><p>Empty bottle</p><p>Balloon</p><p>Bowl of hot water</p> <p><b>The facts about wind</b></p><p>Wind (风) helps people on Earth.</p><p>风能帮助地球上的人们。</p><p>Wind can make a lot of energy (能量) and so people can use it.</p><p>风能产生大量的能量，因此人们可以利用它。</p><p>Wind is the cheapest (最便宜的) form of energy.</p><p>风是最廉价的能量形式。</p><p>Sometimes it is dangerous, and sometimes it is not dangerous at all.</p><p>有时风很危险，但有时它一点儿也不危险。</p><p>It is renewable forever (永远).</p><p>风永远是可再生的。</p><p>How fast does the wind blow (吹)?</p><p>风速有多快？</p><p>Storm winds blow about 110 kilometers per hour.</p><p>暴风的时速大约是110千米。</p><p>Breezes blow about 35 kilometers per hour.</p><p>微风的时速大约是35千米</p> <p><b>风的等级</b></p> <p><b style="color: rgb(237, 35, 8);">拓展:风速仪</b></p><p><span style="color: rgb(1, 1, 1);">anemometer[ˌænɪˈmɑːmɪtər]</span></p><p><span style="color: rgb(1, 1, 1);">风速计; 风速表</span></p><p><span style="color: rgb(1, 1, 1);">Anemometer :an instrument for measuring and indicating the force or speed and sometimes direction of the wind.</span></p><p><span style="color: rgb(1, 1, 1);">风速计：一种用于测量和指示风的力或速度，有时甚至是风向的仪器。</span></p> <p><b style="color: rgb(237, 35, 8);">之前买的科学套餐里刚好有一个相风鸟，刚好拿出来玩</b></p> <p><b style="color: rgb(237, 35, 8);">相风鸟</b></p><p>传说在舜禹时就有相风鸟，用木制成鸟形，置于杆上，鸟能自由转动，其头所指即为风向。据《三辅黄图》记载，汉武帝太初元年(公元前104年)所建的建章宫厥上，装有铜凤凰，下有转枢，风来时，铜凤凰的头向着风好像要飞的样子。东汉时，改装成为另一种侧风器—相风铜鸟，安装在长安西北郊国家设立的灵台上。这种相风铜鸟既能侧风向，还能观测较大风的风力。</p><p><br></p> <p><b>拓展:Straws bagpipe</b></p><p><b>Materials:</b></p><p>Eight straws</p><p>Scisscors</p><p>Ruler</p><p>Masking tape</p><p>Pen or marker</p><p><b>Directions:</b></p><p>1.Measure and cut the straws into these lengths: 19.5 centimeters, 17.0 cm, 15.5 cm, 14.5 cm, 13.0 cm, 11.5 cm, 10.0 cm, 9.5 cm.</p><p>2.Label the longest straw #1, the next longest straw #2, and so on. The smallest straw should be labeled #8.</p><p>3.Tape the straws together in order from longest to shortest. You can use small pieces of straw (about 2 cm long) as spacers between the longer straws. This is called a pan pipe.</p><p>4.Hold the pan pipe vertically below your lips, with the uneven ends pointing down. Blow across the tops of the straws as though you are blowing across the top of a pop bottle. </p><p>5.Try playing one of the songs below, or make up your own songs. Remember: 1 is the longest straw and 8 is the smallest straw.</p><p><br></p><p><b style="color: rgb(237, 35, 8);">What's happening?</b></p><p>As you blow across a straw, the air in the straw vibrates. These vibrations travel outward and reach our ears sounding like the notes of a scale. You can change the pitch (the perceived highness or lowness of a sound) by changing the length of the straw. A long straw produces a low note. A short straw produces a high note.</p><p> 通过向吸管口吹气,将空气快速挤压进吸管里,使空气震动,这动的声音就会从吸管下面的洞口传出来。你可以通过改变吸管的长度来改变音高（感知到的声音的高低）吸管长度控制里面空气的长度，吸管越长音调越低。</p> <p>感觉根本吹不出音乐来。😂</p> <p><b style="color: rgb(57, 181, 74);"><i>阅读时光</i></b></p> <p><b style="color: rgb(57, 181, 74);"><i>小记</i></b></p><p>小黄同学在我家都开始风这个主题的时候出差，搞得我求助无门😓，然后这家伙出差太闲，估计竟然寻思着要教他女儿编程。</p> <p><b style="color: rgb(237, 35, 8);">还自己做了个小样，请问爸爸这是变相献媚吗😏😏</b></p>