高中英语人教版选择性必修第三册Unit3-SectionA教学课件

Unit3EnvironmentalProtection

1SectionAReadingandThinking2MENULeading-inPart1Part2Part3While-classAfter-class3Part.1Leading-in4LeadinginActivity1What

is

the

graph

about?

What

information

can

you

get

from

it?5LeadinginHave

you

ever

seen

the

photo

before?

What

might

be

the

story

behind

it?6LeadinginWhathappenedtothepolarbear？Howdoyoufeelwhenyouseethephoto？Whatdoyouthinkmighthavecausedthepolarbear'sdeath？Doyouthinkitisrelatedtotheglobaltemperaturerise？7Part.2While-class8While-class阅读全文，找出每一段的主题句，划分文章结构PartParagraphMainidea11-2TheevidenceofdramaticclimatechangethathadanimpactonEarth'secology23Thecauseoftheincreaseintheglobalaveragesurfacetemperature34Theconsequencesoftheriseintemperature45Thesolutionstoreducinggreenhousegasemissions9While-classPart1Para1introducing

the

topic

a

dramatic

change

in

the

global

climatethe

reason

for

its

death

Para.

2

finding

a

dead

polar

bear

Global

warming

affected

Earth's

ecology.10While-classWhat

happened

to

the

polar

bear

in

the

photo?

Why

did

the

writer

write

about

it?The

polar

bear

died

from

lack

of

food.The

writer

wrote

about

it

to

show

how

the

increase

in

temperature

had

an

impact

on

Earth's

ecology.11While-classWhatevidenceofclimatechangecanyoufindinthesetwoparagraphs？Whatistheauthor'spurposeofusingthegraphandthephoto？Canyouuseyourwordstodescribehowclimatechangehaveinfluencedthepolarbearslife？12While-classPara.

3

reasons

for

theincrease

in

temperaturethe"natural“greenhouse

effectthe"man-made"

greenhouse

effect-producing

huge

amounts

of

extragreenhouse

gases13While-classWhy

is

the

“natural

”greenhouse

effect

important

andnecessary？What

are

the

consequences

of

high

greenhouse

gas

emissions?

Because

greenhouse

gases

in

the

atmosphere

trap

some

of

the

heat,

keeping

Earth's

climate

warm

and

habitable.

Without

this

process,

Earth

could

not

sustain

life.More

heat

energy

is

trapped

in

the

atmosphere,

which

causes

Earth's

surface

temperature

to

rise

quickly.14While-classDiagramsareveryusefultoolsthatcanbeusedtobrainstormideas,mapoutprocesses,showcauseandeffectrelationships,explainanewideaorconcept,andsoon.Whenyoureadanessayaboutscientificissues,youcantrydrawingadiagram,whichwillnotonlyallowyoutovisualisetheproblemsmoreclearlybutalsocanhelpdemonstrateyourcreativethinkingandproblem-solving.15While-class16While-classPara.

4

results

of

the

rise

in

temperaturean

increase

in

extreme

weather

and

natural

disasters

worldwide

climate

scientists

calling

on

people

to

take

appropriate

actions17While-classWhydidtheauthormentiontheclimatescientists'warning?Because

the

warming

trend

will

cause

great

damage

to

human

beings.18While-classPara.

5

how

we

reactGovernments

need

to

make

policies

and

take

measuresto

reduce

greenhouse

gas

emissions.

Individuals

restrict

the

amount

of

carbon

dioxide

their

lifestyles

produce.19While-classWhat

is

the

author's

purpose

of

writing

this

text?

To

attract

the

attention

of

people

all

over

the

world

to

focus

on

climate

change

and

take

actions

to

reduce

greenhouse

gas

emissions

and

the

carbon

footprint.20Part.3After-class21After-class1Whatexamplesofextremeweatheranddisastersdoyouknow?Canyoumakealist?2Doyouthin