Tuesday, September 1, 2015

Greenhouse effect

HA ATHOLHU MADHARUSA                         ENVIRONMENT STUDIES/ GRADE -5     
             
                       THE GREENHOUSE EFFECT

The greenhouse effect is responsible for maintaining the temperature of the Earth.Without any greenhouse effect the average temperature of the Earth would be about -18˚C, similar to a domestic freezer.  Instead it averages around 15˚C.  Many, although not all, gases in the atmosphere act as so-called ‘greenhouse gases’ and help to warm our planet.  These include: carbon dioxide; water vapour; methane; chlorofluorocarbons (CFCs) and nitrous oxide.


The diagram below shows the greenhouse effect.  Add  labels to the diagram.


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