Module 5.ppt_第1頁(yè)
Module 5.ppt_第2頁(yè)
Module 5.ppt_第3頁(yè)
Module 5.ppt_第4頁(yè)
Module 5.ppt_第5頁(yè)
已閱讀5頁(yè)，還剩2頁(yè)未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡(jiǎn)介

1、成才之路 英語(yǔ),路漫漫其修遠(yuǎn)兮 吾將上下而求索,外研版 必修1,A Lesson in a Lab,Module 5,你做過實(shí)驗(yàn)嗎？你知道化學(xué)變化與物理變化的不同嗎？讓我們一同走進(jìn)屬于我們自己的實(shí)驗(yàn)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(氫氣)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 i

3、ron with a lathe(車床). 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 phy

溫馨提示

  • 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫(kù)網(wǎng)僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

最新文檔

評(píng)論

0/150

提交評(píng)論