Ozone levels in the Southern Hemisphere

This task is about interpreting information from a diagram about ozone.
On this map of the Southern Hemisphere the ozone concentrations are shown in Dobson Units. Ozone levels in the atmosphere are normally 3 mm thick. This is 300 Dobson Units in scientific measurement.
Map of the Earth over Antarctica

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a)  What is the ozone concentration over: 
     i)  New Zealand? Dobson Units.
     ii)  Australia? Dobson Units.

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b) The ozone concentration levels shown on the map indicate the formation of an ozone hole over Antarctica. What does the term 'ozone hole' mean?

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c) Write a summary statement about the change in ozone concentration from the Antarctic to New Zealand.

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d)  In which season does the ozone hole develop over Antarctica?

    • Autumn

    • Winter

    • Spring

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e)  i) What is the function of the ozone layer?

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     ii) Why is this function of the ozone layer important for living things?

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f)  Name an ozone depleting gas.