初中英语外研版（2024）八年级下册（2024））Understanding ideas课文内容ppt课件

这是一份初中英语外研版（2024）八年级下册（2024））Understanding ideas课文内容ppt课件，共29页。PPT课件主要包含了Free talk，Three ，ABC层， million，changed， ants，In Africa，ants，secrets，Thanks to等内容，欢迎下载使用。
通过本课时的学习，学生能够：1. 读懂介绍琥珀的科普文本，提取、梳理关键信息；2. 了解琥珀作为 “时间胶囊” 的科学意义，增强对自然历史的好奇心。
Learning bjectives
1. What are these?
They are pieces f amber.
2. What d yu knw abut amber?
Watch and learn
Amber is a hard, yellwish r brwnish material. It is made frm the resin(树脂) f ancient trees. Over millins f years, the resin becmes hard and turns int amber.Amber can help us knw abut the past in many ways. Smetimes, small insects, plants r ther things get trapped in the resin. When the resin becmes amber, these things are well preserved inside it. By studying amber, scientists can learn what ancient plants and animals lked like. They can als knw mre abut the envirnment and life lng ag.
Lk at the title and the pictures. What is the passage abut? Use the wrd clud t help yu.
Lk and predict
Read the passage and check yur answer.
It’s abut hw amber helps scientists unlck the secrets f nature. It serves as a windw n the past and leads t imprtant discveries. It als shws hw life has changed ver time, ffering a key t understand the histry f species.
Read and check
What is the passage abut?
Hw many secrets are mentined in the passage? What are they?
The secret abut the dinsaur
The secret abut the flwer
The secret abut the ants
Scan and answer
Read Paragraphs 1~2 and answer the questins.
1. What’s in the amber? 2. Where was it fund?3. What did scientists find thrugh it?4. What secrets des it tells?
Read and answer
A dinsaur tail with feathers.
In Sutheast Asia.
Dinsaurs had feathers.
What dinsaurs lked like.
Read Paragraph 3 and fill in the blanks.
A piece f amber frm _______________ hlds a flwer that n lnger grws there, but it prves the flwer was there _____________ years ag. In the future, amber may help us find ut if _____________ have changed ver time.S, life n the earth has always _________.
Nrthern Eurpe
ther species
Read and fill
Read Paragraph 4 and fill in the blanks.
The ants are a cmpletely new species. Ants did nt nly cme frm the nrthern half f the earth; they als lived in Africa.
There are many unknwn species fr us t discver.
Read Paragraph 5 and answer the questins.
1. What des the writer cmpare amber t?2. Why d the writer make these cmparisns?
The writer cmpares amber t a windw n the past and a key t unlck mre secrets f nature.
Cmparing amber t "a windw n the past" shws that it can help us see and learn abut what happened in the past.Cmparing amber t "a key" shws that it can help us discver and understand mre hidden secrets f the natural wrld.
1. Chse where yu are mst likely t read this passage.a In a ppular science magazine abut findings in nature.b In a newspaper reprt n exhibitins abut dinsaurs.c In a sci-fi bk abut travelling160 millin years int the past.
2. What is the genre f this passage?a A science fictin stry abut time travel.b A science article explaining real discveries in nature.c A fictinal stry abut a dinsaur's adventure many years ag.
Read and chse
Cmplete the diagram with the wrds and expressins frm the passage.
Amber shws us 1_________caught in time.
It shws us what ancient species lked like.
It helps us understand that life n earth has 3__________.
It helps us discver new species.
2________ a piece f amber, scientists knw that dinsaurs had feathers.
A piece f amber prves that a kind f flwer nce grew in Nrthern Eurpe 4_________ years ag.
Mre than 300 5.________ species have been discvered.
Scientists fund a new species f 6________ in a piece f amber.
Amber is a(n) 7__________n the past, and a key t unlck mre 8_________.
(always) changed
Read and cmplete
Retell the passage accrding t the diagram.
Let’s retell
Why isn’t the title called The Secrets f Amber r Amber: A Windw t the Past but Secrets caught in time?
Think and share
1. It is mre vivid, interesting and creative. Cmpared with The Secrets f Amber r Amber: A Windw t the Past, this title is mre riginal and attractive.2. It can aruse readers’ curisity. The special expressin makes readers interested and eager t read the passage t find ut the hidden secrets.3. It perfectly matches the passage’s main idea. The phrase “caught in time” exactly shws that amber can keep and preserve ancient life and histrical stries fr millins f years, hlding the secrets f the past.
Paragraph 1 is vivid and interesting. The writer begins like this t draw readers’ interest and make them want t read mre.
1. What d yu think f Paragraph 1? Why des the writer begin like this?
Learning t think fr questin 1Writers have different writing styles. They use different methds t achieve their gals. These gals include making the text alive, making their arguments strng, getting readers' attentin, etc.
We can learn abut nature’s secrets by reading, visiting museums, explring the utdrs, ding research r ding experiments...
2. What are sme ther ways fr yu t learn abut nature's secrets?
1. It is running arund lking fr its next meal. 它正在四处寻找下一顿食物。
lk fr, find与find ut
【语境串记】I lked fr my pen everywhere, but I culdn’t find it. I want t find ut wh tk it away. 我到处找我的钢笔，但没找到。我想弄清楚是谁拿走了它。#1.2.1
Language pints
2. They can tell us whether dinsaurs had feathers, but that’s nt all. 它们能告诉我们恐龙是否有羽毛，但不只如此。
weather /ˈweð ə/ cnj. 是否
用于表示选择或对某事不确定，常用来引导宾语从句，有时可与if互换；whether可以和动词不定式或r nt连用。#1
Mst f us dn’t knw whether/if we will have a picnic. 我们大多数人都不知道这个周末是否会去野餐。Our teachers haven’t decided whether t g r nt. 我们的老师还没有决定去还是不去。#1.2
3. This species n lnger grws in this area. 这个物种不再在这个区域生长。
n lnger（相当于nt... any lnger）不再
常用于系动词be、助动词、情态动词之后，实义动词之前。
Thanks t the effrts f the gvernment and wrkers, pandas are n lnger endangered nw. 多亏政府和工作人员的努力，大熊猫现在不再处于濒危状态。The dctr tld her she culd n lnger play basketball. = The dctr tld her she culdn’t play basketball any lnger. 医生告诉她她再也无法打篮球了。
4. Thanks t amber, mre than 300 unknwn species have been discvered. 多亏了琥珀，人们已经发现了三百多种未知物种。
unknwn /ˌʌnˈnəʊn/ adj.不知道的，未知的unknwn由“否定前缀un-+ knwn（adj.已知的）”构成。常用搭配：be unknwn t 不为……所知
Fr sme unknwn reasn, Mark mved t Greece.不知何故，马克移居希腊了。The authr f the bk is almst unknwn t yung peple. 这本书的作者年轻人几乎都不知道。#1.1.2
［拓展］英语中常见的否定前缀有：① un-表示“不，非”，如：unable 未能；unhappy 不高兴的；unusual不寻常的。②in-（il-,im-,ir-）表示“不，无，非”，如：inactive不活跃的；incrrect不正确的； implite不礼貌的；impatient不耐烦的。③dis-表示“相反；不”，如：disagree不同意；dishnest不诚实的；dislike不喜欢。
5. Scientists used t believe that ants came frm the nrthern half f the earth. 科学家们过去认为，蚂蚁来自地球的北半球。
used t 过去经常（做）
used t表示过去一度存在或经常发生，但现在已经不存在的动作或状态，其后接动词原形，且不与具体的过去时间状语连用。used t的否定形式是didn’t use t或used nt t (usedn’t t)。* We used t talk abut everything. 我们曾经无话不谈。* He didn’t use t wear glasses. = He usedn’t t wear glasses. 他过去不戴眼镜。
* The knife is used t cut fruit. = The knife is used fr cutting fruit. 这把刀是用来切水果的。* Peple shuld get used t travelling by public transprtatin. 人们应该习惯于乘坐公共交通工具出行。
完成句子 1. 下月杂志的主题将是探索自然。 The tpic fr ur magazine next mnth will be ________ _______.2. 他们想知道这个博物馆周末是否开放。They _________ _________ the museum is pen n weekends.3. 阅读帮助我们揭开世界的奥秘。Reading helps us ______ __________ __________ f the wrld.4.这个小村庄里曾经有很多旧房子。There ______ ______ be many ld huses in this small village.5. 他不再是一个小男孩了，所以他应该学会照顾自己。He is ______ ______ a little by, s he shuld learn t take care f himself.
explring nature     
wnder if/whether
unlck the secrets
used t
n lnger      
Write a shrt passage abut hw amber helps scientists unlck the secrets f nature.
Search fr a discvery in nature explratin fcusing n what the discvery is, wh made it and what’s amazing abut it.