Unit4ProtectingtheEnvironmentReadingA课件高中英语上外版（2020）选择性

《

高

中

英

语

》

(上

外

版

)选择性必修第三册第四单元

ProtectingtheEnvironment

授课教师：

课时授课内容1Getting

Started/Reading

A1Reading

A/VocabularyFocus1Reading

A/GrammarinUse1.5Listening,Viewingand

Speaking1ReadingB0.5CriticalThinking1Writing1FurtherExploration/Self-assessment《

高

中

英

语

》

(上

外

版

)选择性必修第三册第四单元buildupawebof

thetop-relatedwordsandexpressionsand

learntoapplythem;3.能运用本单元所学的主题语境相关词和习惯搭配讨论有关

全球变暖对人类生活的影响，并有逻辑地解释它的起因。conductadiscussionbyusingthetopic-relatedwordsand

expressionslearntinthetextandexplainpossible

causes

ina

logicalway.学习目标

Learning

Objectives：Attheendof

the

lesson,

you

will

be

able

to

...1.能在语境中学习和运用课文核心词汇和常用词组；furtherunderstandthetextandlearnthetargetwordswhileanalysingfunctions,

effectsandcausesof

carbondioxidethroughsomequestions

based

onthe

text;2.能列举并运用与本单元主题语境相关的动词、名词及其习惯搭

配和表达；What

is

the

theme

of

the

text?Thewriterdescribesthefunctionsof

small

quality

ofcarbondioxide,

harmfuleffectsofcarbon

dioxide,

and

the

causesoftheseconsequencesto

makethe

public

awareoftheserious

resultsofglobal

warming.Reviewthe

main

ideaandorganization

ofReading

A.

What

istheorganizationofthe

text?Canyou

identitytheconnectorthat

linksthetwofunctions

ofcarbon

dioxide

in

Para.

2-3?What

’s

more.1)what’s

moretoadd

more

informationthatemphasizeswhatyou

are

saying

更为甚者；更为重要的是Reviewandanalysethe

functions

of

smallquantity

of

carbon

dioxide

in

Para.

2-3.•空气中少量的二氧化碳对我们没有害处，更为重要的

是它对生命很重要。(what’s

more)Asmallqualityof

carbon

dioxide

in

the

air

does

usno

harm,and

what’s

more

it

is

essential

to

life.Reviewandanalysethe

functions

of

smallquantity

of

carbon

dioxide

in

Para.

2-3.2)absorb/əbˈsɔ:b/vt.totake

in

liquid,gas,oranothersubstance

from

the

surface

orspace

around

something

吸收（液体、气体等）absorb

heat/carbondioxide/water/knowledgesb.

be

absorbed

in

one’s

workabsorption/əbˈsɔːpʃən/nounabsorbent/əbˈsɔːbənt/adjectiveReviewandanalysethe

functions

of

smallquantity

of

carbon

dioxide

in

Para.

2-3.Choosethewordand

phrases

mentionedabove

andfill

inthe

blanks

in

proper

forms.1.The

scientists

are

absorbed

in

their

work

on

plants’

absorption

ofcarbon

dioxide.2.To

sell

recognized

that

these

qualities

might

make

it

useful

as

an

absorbent

materialfor

removingcarbondioxide.Reviewandanalysethe

functions

of

smallquantity

of

carbon

dioxide

in

Para.

2-3.Could

you

list

the

words

and

expressons

related

to

thefunction

of

CO2

in

Para.

2-3?beconverted

intotheir

owntissuedo

no

harmbeabsorbed

by

plants

releaseoxygenReviewandanalysethe

functions

of

smallquantity

of

carbon

dioxide

in

Para.

2-3.serveasthe

basic

foodfunctionsThe

sea

level

is

rising

very

slowly

and

in

all

it

willcontinue

to

rise

and

do

so

at

a

greater

rate

in

the

course

of

the

nexthundredyears.Why

isthisapparently

harmlessandcertainly

essential

gasharmful

to

us?Reviewandanalysethe

harmful

effects

ofCO2

in

Para.4-6.3)

likelihood/ˈlaɪklihʊd/n.the

chance

of

sth

happening;

how

likely

sth

is

to

happen可能；可能性adj.&

adv.

likelysb./sth.

be

likelyto

dosth.It

’s

likelythat...Reviewandanalysethe

harmful

effects

ofCO2

in

Para.4-6.e.g.

In

all

likelihood,the

sea

level

will

continue

to

rise

and

do

so

at

agreater

rate

in

the

course

of

the

next

hundred

years. The

sea

level

will

be

likely

to

continue

to

rise

and

do

so

at

agreater

rate

in

the

course

of

the

next

hundred

years.

It's

likely

that

the

sea

level

will

continue

to

rise

and

do

so

at

a___________greater

rate

in

the

course

of

the

next

hundred

years.Reviewandanalysethe

harmful

effects

ofCO2

in

Para.4-6.•

随着海平面的每年上升，许多城市很可能被淹没，引起了世界上很多耕地丢失。Asthesea

level

is

risingfromyeartoyear,

in

all

likelihood,

many

cities

will

bedrowned,causing

muchofthe

mostfarming

landofthe

world

to

be

lost.Asthesea

level

is

risingfromyeartoyear,

many

cities

are

likelyto

be

drowned,causing

muchofthe

mostfarming

landoftheworldto

be

lost.Asthesea

level

is

risingfromyeartoyear,

it’s

likelythat

many

cities

will

bedrowned,causing

muchofthe

mostfarming

landof

the

world

to

be

lost.Reviewandanalysethe

harmful

effects

ofCO2

in

Para.4-6.widespreadfoodsupply

dropseffectsfarming

landwill

be

lostmanycitieswill

be

drownedsea

level

is

risingitcontinuesto

rise

at

agreater

rate

inall

likelihoodthesea

issplashing

againstthewindowsCouldyou

listthewordsandexpressions

relatedtothe

harmful

effectsofCO2

in

Para.

4-6?Reviewandanalysethe

harmful

effects

ofCO2

in

Para.4-6.starvationwill

beWhatdoesthegreenhouse

effect

mean?It

meansan

increase

intheconcentrationofcarbon

dioxide

in

the

atmospherethat

leadstoan

increase

inthe

plantet’saveragetemperature.4)concentration/ˌkɒnsənˈtreɪʃən/n.the

amount

of

a

substance

contained

in

a

liquid

or

in

anothersubstance

浓度；含量n.the

ability

to

direct

all

your

effort

and

attention

on

one

thing,without

thinking

of

other

things

专心；专注Reviewandanalyse

the

causes

ofconsequences

of

CO2in

Para.7-11.vt.concentrate

集中于；专注concentrateone’sefforts/attention/energy/mindetcon

something

全神贯注于；集中于在这节课上,生物老师将着重讲温室效应是怎样形成的。(concentrate)Reviewandanalyse

the

causes

ofconsequences

of

CO2in

Para.7-11.In

this

class,the

biology

class

shall

concentrate

(his

attention)

on

howthegreenhouseeffect

comes

about.•随着温室气体浓度的下降，地球开始再次变冷，最终又将回到冰河时代。(concentration

)Graduallyastheconcentrationofgreenhousegasesgoes

down

,

Earth

startstocoolagain,and

eventuallyyou

slip

back

into

an

Ice

Age.•Human

beings

need

powers

of

concentration

to

stop

theconcentration

ofcarbondioxidefrom

moving

upwardstoavoidthegreenhouse

effect.（英译中）为了避免温室效应，人类必须集中精力阻止二氧化碳的浓度上升。Reviewandanalyse

the

causes

ofconsequences

of

CO2in

Para.7-11.What

is

itthatdemonstratesthevillainyof

carbon

dioxide?It

isthe

meltingofthe

icecapsthatdemonstrates

the

villainy

ofcarbondioxide.5)demonstrate/ˈdemənstreɪt/v.to

show

sth

clearly

by

giving

proof

or

evidence证明；证实；论证；说明sth

(to

sb)that/how/what/why

etcn.demonstrationReviewandanalyse

the

causes

ofconsequences

of

CO2in

Para.7-11.~~•这些结果有力地证明，

空气中的坏人是二氧化碳。(demonstrate)These

resultsdemonstrateconvincinglythatthevillain

intheatmosphere

iscarbondioxide.•冰盖的融化清楚的说明了全球的气候变暖

。

(demonstration)The

melting

of

the

ice

caps

is

_

_Reviewandanalyse

the

causes

ofconsequences

of

CO2in

Para.7-11.Couldyou

listthewordsandexpressions

relatedtothecauses

ofthese

consequences

in

Para.7-11?demonstratethevillainyof

CO2theglacierswill

retreat,thebeginwithsunlightmake

uponly0.0316

percent

thevillainycomes

inReviewandanalyse

the

causes

ofconsequences

of

CO2in

Para.7-11.

infrared

radiationPolar

icecaps

will

meltcausesconcentrationofCO2

goes

up

steadily

radiate

heat

intheform

ofTheVillainintheAtmosphere1.

Functionsof

carbon

dioxide2.

Harmfuleffects

of

carbondioxide3.Causes

oftheseconsequencesdo

no

harm,beabsorbed

by

plants,

releaseoxygen,serveasthe

basicfood,

beconverted

intotheir

owntissue...sea

levelis

rising,inall

likelihood,itcontinuesto

rise

at

agreater

rate,splashagainstthewindows,

manycitieswill

bedrowned,

farming

landwill

be

lost,foodsupply

drops,starvationwill

bewidespread

...beginwithsunlight,radiate

heat

intheformofinfrared

radiation,concentrationofCO2

goes

up,

thevillainycomes

in,make

up

only0.0316

percenttheglacierswill

retreat,the

Polarice

capswill

melt,

demonstratethevillainyofCO2...Listthetopic-relatedwordsandexpressions.A:

Doyou

knowanythingaboutcarbondioxide?B:Carbondioxide

isagas.We

breathe

inoxygen

and

breathe

out

carbon

dioxide.And

plants1

absorb

carbondioxide.A:Socarbondioxide

is

not

really

harmful?B:Well,carbondioxideitselfdoes

not

2

do

harm

to

the

environment,

but

the

3

concentration

ofitintheatmosphere

causesthe

“greenhouse

effect.

”A:What

isthe“greenhouseeffect

”?B:

It

isthe

process

bywhich

radiationfromthesun

is

blocked

bythegreenhousegasesandnot

reflected

backintospace.The

4

atmosphere

retains

more

heatthan

necessary.A:

Howdoesthat5

come

about

?Fill

inthe

blankswiththeappropriateformsofthegivenwords

and

expressionsto

completethedialogue.

Notethattherearetwo

moreoptionsthanyou

need.widespreadatmosphereestimatequantityreleasedo

harmtoat

a

rate

ofcome

aboutabsorbconcentrationB:

Inthe

lastfewcenturies,coal,oiland

natural

gas

have

been

burned

for

energy

at

a

rapidlyincreasing

rate.Thecarboncontainedinthese

fuels

is

being

6released

intheformofcarbondioxideand

poured

intothe

atmosphere.A:Andtheforests,once7

widespread,

have

beendisappearing

rapidly

inthe

lastcoupleofcenturies.B:

Exactly.

It

is8

estimated

thattropicalforestsare

nowdisappearing

9

at

a

rate

of

about

13

million

hectares

peryear.A:

Isee.The

burningoffueladds

morecarbon

dioxidetothe

atmosphere,

and

as

theforestsdisappear,

lesscarbondi