2023學(xué)年完整公開課版七年級下冊Module 3 Natural elementsUnit 5 Water

Iamoneofthenaturalelements.Ihavenocolour,Ihavenosmell,Ihavenotaste,Ihavenoshape,ButIamveryvaluable.

Right!

I’mwater!Flowersandtreesneedme,Youneedtodrinkmeeveryday.Riddle（謎語）CanyouguesswhoIam?Learningobjectives

（學(xué)習(xí)目標(biāo)）Aftertheclass,studentswillbeabletoknowabout:

thevalueofwater

howtosavewaterDoyouthinkwaterisvaluable?Why?TheEarth75%water1.About________ofthehumanbodyiswater.50% B.30% C.70%2.About________oftheEarthiswater.80% B.75% C.60%3.Mostofthewaterintheworldis________.A.freshwater B.drinkable C.undrinkable

4.Ifwaterdripsfromthetapevery10seconds,wewillwasteabout______litresofwaterayear.A.215 B.315 C.415

5.Havingashowerinsteadofabathcansaveupto______litresofwateraweek.A.400 B.300 C.200Aquizaboutwater

Howcanwesavevaluablewater?savewaterfixadrippingtapturnoffthetaptakeashowerinsteadofbathusewashingmachineforfullloadsonlyplaywithwater

brushourteethunderarunningtapwashvegetablesunderarunningtap1drippingtap

Fix

aTurnoffthetap

2

insteadof

showerbath

3Takea

Wash

yourbikeorcarwithwaterandsponge

insteadof

ahose.4Weshould...5

washvegetablesunderarunningtapWeshouldn't...

6

brushyourteethunderarunningtap

7playwithwaterWhatcanwedotosavevaluablewater?Weshould...turnoffthewatertapreusewatertakeashowerinsteadofabathWecansavewaterby+V-ingfixadrippingtapcollectrainwatertowaterplantsandwashcarscleanthefloorwithusedwaterWeshouldn't...pollutewaterwashvegetablesunderrunningwaterbrushourteethunderrunningwaterplaywithwater...Learningobjectives

（學(xué)習(xí)目標(biāo)）Aftertheclass,studentswillbeabletoknowabout:

howwaterbecomesrainwherewatercomesfromHowmuchdoyouknowaboutwater?1.Youcanlivewithoutwaterforafew

. A.daysB.weeksC.hours2.Yourbodyneedsabout_____litresofwaterdaily. A.twoB.fourC.eight3.Whenyouexercise,youneed

water. A.moreB.thesameC.less4.Whenyoufreezewater,itbecomesa

.A.liquidB.solidC.gas5.Watercoversabout_____oftheEarth.A.onethirdB.onehalfC.twothirds6.About_____ofthewateronEarthis“fresh”orwithoutsalt.A.3%B.10%C.20%AAABCAHowmanyforms(形態(tài)）doeswaterhave?Howcanwesavevaluablewater?savewaterfixadrippingtapturnoffthetaptakeashowerinsteadofbathusewashingmachineforfullloadsonlyplaywithwater

brushourteethunderarunningtapwashvegetablesunderarunningtapFirst,waterfallsfromthecloudsasrain.12345Then,itrunsintotherivers.Next,itrunsintothesea.Afterthat,itrisesfromtheseatothesky.Finally,itfallsasrainagain.Watercycle

Howdoeswaterbecomerain?First,…h(huán)eatsthewaterThen,…becomesvapour…Next,…formscloudsFinally,…coolsandformssmalldropsofwaterWheredoeswatercomefrom?Then,itdropsinto_____andrunsinto_________.First,itwasin_______.Next,peoplecleanthewaterandaddsomechemicalstothewater.Afterthat,thewa