Putting the Sun to Work
Its a hot summer day, and you, your family, and friends decide to drive to the beach for a cookout.
When you get to the beach, the sand and the rocks are so hot that they hurt your bare feet. You put on sneakers in a hurry. The water is so bright and shining in the sun that you can hardly look at it. While the charcoal fire is starting to burn in the cookout stove, every one goes for a swim. The water feels goodwarm at the top, but cooler down around your toes.
A little wind is blowing when you come out. The fire isnt quite ready for cooking yet, so you play tag or read.
For lunch there are hot dog, corn, salad and rolls, sodas, fruit, and coffee for the adults. By the time the coffee water boils and the corn and hot dogs are cooked, all the bathing suits are dry. So are the towels spread out on the rocks, in the sun.
Lunch is good. Just as you are finishing, it starts to rain so you pack up and run. But nobody minds the rain. It will cool things off.
At the same time you were having fun at the beach, work was being done. Energy from the sun was doing work. Energy, in one form or another, does all the work in the world.
Heat energy from the sun dried the towels. It heated the sand and the rocks, the water and the air. It even made the rain and the wind. Heat from the sun does small work and big work, all over the earth.
Light energy from the sun was working on the beach too. It supplied the daylight.
It lit the earth and made the sand bright and the water sparkling.
The sun also supplied the energy that grew the food you ate.
Plants use light energy from the sun to make food for themselves. The food is a kind of sugar. It is also a kind of energy called chemical energy. Green plants change light energy from the sun into chemical energy.
Plants use some of that energy for everyday living and growing. They store the rest in their leaves and seeds, in fruit, roots, stems, and berries.
The salad and the corn, the rolls, fruit, and coffee all came from plants. You and all animals depend on plants for food.
The charcoal you used for cooking began as a plant too. Once, that charcoal was a living tree that used sunlight to make food and then stored part of the food it made. The energy in this stored food remained, even after the tree died. You used that energy when you burned the charcoal.
分享:一个激发孩子学习动力的故事
好幼儿园和好小学哪个更重要?
家长必读:孩子上英语兴趣班三大注意
朝阳区重点知名幼儿园排名
专家观点:孩子几岁学英语比较好
西城幼升小教改内容:禁跨区择校、撤并19所小学
小朋友学学英语的实益
专家指导:少儿学英语从“读”开始
2014宝宝入园准备攻略大全
专家建议:孩子学英语最好在六岁以前
北京市西城区试行学区制:推进教育均衡发展
家长如何助力孩子把英语学好
幼小衔接中家长必备的四大关键词
幼升小如何确定性价比较高的学校?
幼升小要做好哪些知识准备
美国早教书谈3-5岁亲子阅读五法则
孩子上小学,有必要这样准备吗?
专家指导:小朋友如何通过电影学英语
背单词是中国孩子学英语最大的误区
专家解读:敬畏感与孩子的学习动力
幼升小家长最易忽视的入学准备
入学前几个月,家长要做哪些准备?
上幼儿园真的没那么难!
幼升小面试中不可不知的四条成功秘籍
幼升小面试必读:自我介绍有大学问
让宝宝“能说会道” 8个独家秘技
公立幼儿园家长谈对选幼儿园的一点感受
幼升小面试:重点小学主要考查的七方面
幼升小必备秘笈:怎样帮助孩子表达自我
家长必读:孩子不爱学英语怎么办
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |