Programed instructional material: Global Warming

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Text of Programed instructional material: Global Warming

  • Topic: Global warming Class: 7th

    Medium: English

    Lets start module

    1

    Programmed Instructional material

  • Objectives

    At the end of this module you will be able to-

    Know about the meaning of global warming

    Know about different green house gases

    Know about various sources of green house

    gases

    Know about causes of global warming

    Know about control about on global

    warmingLets start module

    2

  • Global warming means gradual increase in worlds

    temperature caused by green house gases the impact of

    global warming can be seen in sea levels , rainfall and

    human health.

    Massive deforestation, burning of fossil flues,

    industrial emissions etc have resulted to an increase in

    green house gases around earths atmosphere.

    The green house gases trap sun rays in the earths

    atmosphere causing the temperature to rise resulting

    in what is known as global warming.

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  • The heat would have otherwise released if the green

    house gases were not present in such huge quality.

    The warming of atmosphere due to the presence of

    green house gas this is responsible for global warming

    is carbon dioxide[CO2] others include nitrous oxide,

    chlorofluorocarbon[CFC], methane etc .

    Next Page

  • Sources of Green house gases

    Carbon dioxide [CO2] : the major green

    house gas is carbon dioxide. The source of

    carbon dioxide includes burning of fossil

    fuels, levels increases as a consequence of

    deforestation.

    Methane [ CH4] : methane is responsible for

    about 20 % of the green house effect. The

    source of methane includes rice , paddies ,

    burning of wood , cattle , wetland , land

    fields etc

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  • Chlorofluorocarbon [CFC]: about 15% of

    greenhouse effect is due to these gases. In

    case of heat absorbing power it is thousand

    time more effective than CO2. The source of

    CFC includes air conditioning industry ,

    foam packing industry etc.

    Nitrous oxide: nitrous oxide is responsible

    for 5% of the green house gases . Its sources

    are coal burning, breaking down of

    chemical fertilizers, biomass burning etc.

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  • Global warming can be control if we stop

    deforestation [cutting of trees] , start and

    adopt afforestation [establishment of new

    forests], reforestation [re-establishment of

    old forest] and other forest conservation

    methods. Reduce the use of fossil fuels in

    power and electricity generation.

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    Lets answer some questions

  • Q1: Global warming means gradual

    increase in.

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  • Q2: Massive deforestation, burning of

    fossil fuels and industrial emissions have

    resulted to an increase in green house

    gases around Earths

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  • Q3: The green house gases trap

    ______ rays in the earth atmosphere.

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  • Q4: The warming of atmosphere due

    to the presence of green house gases

    is called

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  • Q5: The main greenhouse gas is

    responsible for global warming is

    ____

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  • Q6: Sources of carbon dioxide are/is

    -

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  • Q7: Methane is responsible for about

    ____ % of the green house effect.

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    Methane [ CH4] : methane isresponsible for about 20 % of thegreen house effect. The source ofmethane includes rice , paddies ,burning of wood , cattle , wetland ,land fields etc

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  • Q8: Sources of methane are ____

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  • Q9: Chlorofluorocarbon is

    responsible for about ___ % of green

    house effect.

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    Chlorofluorocarbon [CFC] : about 15% ofgreenhouse effect is due to these gases. In caseof heat absorbing power it is thousand timemore effective than co2 . The source of cfcincludes air conditioning industry , foampacking industry etc.

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  • Q10: Global warming can be control

    if we _____

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    Click Here to know your score

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  • Congratulations you have Scored

    100/100 marks!

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