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.
2014年中考英语写作背诵范文及翻译:出游邀请
2014中考英语作文题目预测及范文:创建文明城市
2014年中考英语写作背诵范文及翻译:天气状况
2014年中考英语写作背诵范文及翻译:成为导游
2014中考英语作文题目预测及范文:低碳生活
中考英语必备:写出高分句子的八种方法
中考英语作文范例:酒店投诉
2014年济南中考英语作文范文
2014中考英语作文题目预测及范文:经验交流发言稿
2014年中考英语写作背诵范文及翻译:介绍学校
2014中考英语作文题目预测及范文汇总
2014中考英语作文题目预测及范文:关于留守学生的报道
中考英语作文范例:海报内容
中考英语作文范例:编对话(1)
【精品推荐】中考英语情景作文万能模板
2014中考英语作文题目预测及范文:运动与健康
中考英语作文如何做到突出句子重点
2014中考英语作文题目预测及范文:感谢父母号召信
2014中考英语作文题目预测及范文:改善环境污染
2014年福州中考英语作文范文:家乡的名胜
中考英语作文范例:给姚明的信
2014中考英语作文题目预测及范文:关爱生命
2014中考英语作文题目预测及范文:创建和谐校园
2014中考英语作文题目预测及范文:学会放松
2014年中考英语写作背诵范文及翻译:电脑
中考生必备60个中考英语作文热点句型
写好中考英语作文只需五步
2014中考英语作文题目预测及范文:对未来生活的期待
2014中考英语作文题目预测及范文:光盘行动
2014中考英语作文题目预测及范文:暑假计划
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |