英语选择性必修 第一册Unit 5 Revealing nature精品课件ppt

这是一份英语选择性必修 第一册Unit 5 Revealing nature精品课件ppt，文件包含Unit5第01讲StartingoutUnderstandingideasComprehendingpptx、Unit51StartingoutUnderstandingideasComprehendingdocx等2份课件配套教学资源，其中PPT共21页， 欢迎下载使用。

Only t bey nature in rder t vercme nature.要征服自然就只能遵从自然。
单元主题语境：人与自然
①As is knwn t all，we are always cnsuming varius fds.We have t spend large parts f ur days finding，buying，cking and eating ur fd.Did yu ever think it might be nice t be able t make yur wn fd like plants d? Plants are prducers.②They perfrm a prcess called phtsynthesis(光合作用) using light frm the sun，water and carbn dixide.The end result f this chemical reactin is sugar fr the plant t “eat”.The plant gives ff water and xygen.
S hw d plants d it，and why can’t we? Plants have special structures called chlrplasts(叶绿体) that animals dn ’t have.③These structures are filled with chlrphyll，which gives leafy green plants their green clr.Their main jb is t absrb light frm the sun.Chlrplasts can absrb every clr except green.Light makes chlrphyll active.It creates an energy that separates water ut int hydrgen and xygen.Chemical reactins take place.Hydrgen frm the water cmbines with carbn frm the carbn dixide we breathe ut.Oxygen is sent ut int the air.
Peple and plants make perfect partners.Plants rely n the carbn dixide that we breathe ut，and we rely n the xygen that they “breathe” ut.This is ne gd reasn fr prtecting plant life n Earth.Many plants can prduce a cnstant supply f xygen fr us.We need plants in rder t survive.Cnservatin prjects arund the glbe are aimed at prtecting ur natural resurces，including numerus species f plants.Our quality f life and the fresh air we breathe depend upn ur green plant partners.
靓句运用于写作①As we all knw，it is very hard t defeat a strng team.(2019·全国Ⅱ，书面表达)②Several artists will perfrm sme music using the mdern instruments.(2019·全国Ⅲ，书面表达)③There are a lt f different kinds f activities，which will build up yur bdy.(2018·全国Ⅲ，书面表达)
读前清障 识记单词 快速顺畅阅读
语篇理解 精读精练 萃取文本精华
Perid One　Starting ut & Understanding ideas—Cmprehending
识记单词 快速顺畅阅读
匹配左边的单词和右边的汉语意思[第一组]1.seed A.地质学家2.distant B.种子，籽3.disgrace C.遥远的4.gelgist D.样本5.sample E.丢脸，耻辱
[第二组]6.beak A.产生，创造7.suspect B.进化(论)8.ancestr C.鸟嘴，喙9.evlutin D.(动物的)原种，祖先10.generate E.猜想，怀疑，觉得
精读精练 萃取文本精华
Step 1　Fast-reading1.What’s the main idea f the passage?A.The captain f the ship was very discvered smething abut evlutin n the ’s father thught prly f ’s thery f evlutin caused a strm.
2.Read the passage and match the main idea f each part.Para.1　 A.Darwin’s great achievement—the bk On the Origin f Species.Para.2 B.Darwin discvered that species evlved frm earlier ancestrs.Para.3 C.During the jurney Darwin was cnsidering hw different species came t exist.Paras.4－5 D.Darwin wanted t prve whether animals evlved as adapting t the changing envirnments.Paras.6－7 E.The captain f the ship wanted smene t prfit the jurney n the Beagle.
Step 2　Careful-readingRead the passage carefully and chse the best can infer frm the first paragraph that ’s father wasn’t satisfied with himB.Darwin was the right persn the captain liked bestC.Darwin had cmpleted his degree befre sailingD.The captain wanted smene t d sme wrk fr him
2.Which f the fllwing statements is TRUE?A.When Darwin was in Suth America，his rm was full f the peple liked Darwin’s bk when it was 1835，what interested Darwin was the did much research befre publishing his bk—On the Origin f Species.
3.Why did Darwin’s bk On the Origin f Species cause a strm? A.Because Darwin’s father cnsidered it a the bk referred t smething abut peple used t believe that all species had happened n Earth at the same Darwin’s thery was shrt f evidence.
Step 3　Pst-readingAfter reading the passage，please fill in the fllwing blanks.The captain f the ship named the Beagle wanted smene t prfit by 1. (visit) distant cuntries.Luckily，Darwin gt the pprtunity,2. he was nt the captain’s first chice.Darwin was a gelgist and naturalist,3. (fascinate) by rcks，plants and animals.The jurney gave him the chance 4. (study) varius living things in their natural envirnments.After Darwin 5. (spend) sme time in Suth America，his rm was crwded with samples f the plants and animals he had cllected.
althugh/thugh
He began t cnsider the questin 6. different species came t exist.He nticed that sme species f animals were very similar 7. each ther.Maybe animals evlved as they adapted t their 8. (change) envirnments? Darwin decided t find ut the truth.In 1835，Darwin saw a variety f new species，but it was the birds that interested him the mst.After much research，he came t the 9. (cnclude) that new species evlved frm earlier ancestrs.Darwin explained this thery in his bk，On the Origin f Species，which 10. (regard) as ne f the mst imprtant wrks ever written.It has changed ideas abut life n Earth frever，and it all began with the jurney n the Beagle.
is regarded
Step 4　Sentence-learning1.After Darwin had spent sme time in Suth America，his rm n the ship was crwded with samples f the plants and animals he had cllected.[句式分析]　该句为复合句。after引导时间状语从句；___________________ 是主句；he had cllected是 从句，修饰samples f the plants and animals。[自主翻译] 　___________________________________________________________________________________
his rm n the ship
达尔文在南美洲待了一段时间之后，他船上的房间里放满了他收集来的动物和植物的样本。
was crwded with samples f the plants and animals
2.When the Beagle reached the Galapags Islands in 1835，Darwin saw a variety f new species，but it was the birds that interested him the mst.[句式分析]　该句为复合句。when引导 从句；主句是由but连接的并列句。第二个分句中含有强调句型 ，强调主语the birds。[自主翻译]　____________________________________________________________________________________________
在1835年，当贝格尔号到达加拉帕戈斯群岛时，达尔文看到了多种新物种，但是最吸引他的是鸟类。