2020-2021学年Unit 4 Creatures Large and Small课文内容课件ppt

这是一份2020-2021学年Unit 4 Creatures Large and Small课文内容课件ppt，共21页。PPT课件主要包含了Spider，Line11-24，shelter，survive，emerge，Line26-32，spacecraft，friends ，Thank you等内容，欢迎下载使用。

What are they?
1. Hw d yu feel abut it?2. If a spider like this appears in yur kitchen, what will yu d?
Winstn and Betty
Friend r Enemy?
Skimming Read line 1-10 and answer the des Betty think f spiders?2.What des Winstn think f spiders?3. What changed his view abut spiders?
She thinks spiders are insects and shuld be killed.
He thinks spiders are nt insects and they are very useful creatures.
A TV prgramme changed his view.
Read line 11-24 and answer the questins. 1. Wh will use spiders in this part? 2. Why are spiders useful t them? 3. What d they d fr spiders? 4. Why d they d s?
The spiders can prtect their fields and crps.
In autumn, farmers build shelters fr spiders and put them all ver their fields.
Farmers help the spiders survive the winter and they emerge healthy and hungry in spring. Thus, they fill their stmachs by eating insects in fields.
Farmers will use spiders.
Emergency shelter fr earthquake disasters
Spiders in the shelterssurvive the winter.
This girl survived the earthquake.
The sun emerged frm behind the cluds.
Read line 26-32 and answer the questins.Wh will use spiders in this part?What d they d with spiders?3. What are the prperties f the silk f spiders?
They are trying t develp a material having similar prperties with the silk f the spider and then plan t use it in spacecraft, artificial rgans and bulletprf vests.
Spider silk
The silk is strnger than steel, lighter than a feather and as elastic as a rubber band.
The scientists will use spiders.
The uses f spider silk
bullet-prf vest
artificial rgans
Line 26-29
strnger than steel→
←lighter than a feather
as elastic as a rubber band→
The prperties f spider silk
Read line 33-37 and answer the questins.Wh will use spiders in this part?What d they d with spiders?3. Why?
Dctrs think spiders’ pisn might be used t treat brain disrders in humans.
Line 33 -37
Spider pisn
Because the spiders’ pisn is rarely dangerus t peple and is useful.
The dctrs will use spiders.
pest cntrl
We shuld try t understand things in nature and nt destry them.
Line 38 -40
right attitude twards spiders
Spiders are nt insects, but are useful ________. Farmers build_______ fr them and put them all ver their ______, s spiders can eat insects attacking the farmers’ crps. Scientists think spider ____ is als useful. They want t use a similar material in __________, artificial _______, and __________ vests. Dctrs think spider _____ can be ______ t peple, t. Fr example, it can be used t treat ______ _______. Peple shuld try t __________ things in nature, like spiders and nt _______ them.
brain disrders
Student 1--- hst/hstess---HStudent 2--- farmer---FStudent 3--- scientist---SStudent 4--- dctr ---D
Daily tpic: Spiders are friends f human beings
Rle play: A TV Talk Shw abut spiders
H: Hell, everyne. In tday’s shw, ur tpic is _. Here are three guests. It's a delight t meet yu. Culd yu please intrduce yurselves t ur audience? (Guests intrduce themselves)H: Why are spiders friends f humans? Nw let’s welcme *** t share his/her ideas.F: Spiders are useful because they can be used fr pest cntrl... (shelter, survive, emerge, fill their stmachs)S: I d agree with… Spider silk is useful … (strnger, lighter, elastic, spacecraft, bullet-prf vest, artificial rgans)D: I culdn't agree mre. Spider pisn is als useful… (brain disrders)H: Thank yu fr all yur pinins. Frm what yu have said, we can cnclude that__________. Let’s prtect them!
Spiders are friends f human beings
HmewrkRead the new wrds and the text after the tape at least three times and pay attentin t the intnatin and rhythm f the wrds. Finish the exercise E2 n page 51.3. Retell the text arund 120 wrds.