高中英语 Module5 A Lesson in a Lab 外研版必修1_第1页
高中英语 Module5 A Lesson in a Lab 外研版必修1_第2页
高中英语 Module5 A Lesson in a Lab 外研版必修1_第3页
高中英语 Module5 A Lesson in a Lab 外研版必修1_第4页
高中英语 Module5 A Lesson in a Lab 外研版必修1_第5页
已阅读5页,还剩2页未读 继续免费阅读

下载本文档

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

1、成才之路 英语,路漫漫其修远兮 吾将上下而求索,外研版 必修1,A Lesson in a Lab,Module 5,你做过实验吗?你知道化学变化与物理变化的不同吗?让我们一同走进属于我们自己的实验室吧。 There are two kinds of changesthe chemical change and the physical change. In a chemical change, there is a new substance formed. Breaking up water into hydrogen(氢气)and oxygen is a chemical change.

2、 In each of the chemical changes, at least one new substance is formed. A change is not a chemical change if it doesnt form a new substance,Physical changes are very common, too. There are many examples. You can make a physical change by tearing a piece of paper into two, or by cutting a piece of ir

3、on with a lathe(车床). Here paper is still paper, and the iron is still iron,Another way of making physical change is dissolving something in water. When you dissolve salt in water, the salt disappears, You may think that a new substance has been formed. But really there is no new substance. The salt is still salt. You can still taste it. So the dissolving of anything is a physical change. When water freezes, the change is also a physical one. The water changes from a liquid to a solid. But it is still the same substance. That is why the freezing of anything is a p

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论