Guru Charan Kumar
a simplified description of reality;
designed to show the structure or workings of an object, system or concept;
oceanic circulation/ice/human activity/land and terrestrial features;
 for any two correct.
nitrogen/oxygen/carbon dioxide/water vapour/methane/ozone/
other named trace gases;
Four correct , three or two correct .
solar inputs will be short wavelength, and radiation outputs will be long
pollutant emissions leading to photochemical smogs;
increased global temperatures through burning fossil fuels;
altering chemistry of precipitation through sulfur dioxide/SO2 and
nitrogen oxide/NOx emissions; x depletion of stratospheric ozone
increasing input of UV light;
reducing rainfall through deforestation;
it stresses the interactions (feedback) within the system;
represents the complex atmosphere as a system with inputs, outputs
Accept other reasonable strengths.
nature of the interactions is not really shown;
some categories are too broad to be helpful e.g. atmospheric circulation;
some interactions are not shown;
relative importance of different parts of the system not shown;
Answer must refer to both strengths and limitations for full marks.