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Volcanoes emit millions of tons of gas into the atmosphere every day, but which gases are being produced? A small volcano from New Zealand is active and scattering dust, smoke and vapour every day. A volcanologist is investigating which gases are produced by the volcano. He collects the samples by inserting a tube inside the volcano. He identifies the main gases produced as water vapour (80%) and carbon dioxide (15%). Sulphur and hydrogen chloride are also produced.
This clip is from:
First broadcast:
11 October 2007

Classroom Ideas

When learning about different gases in the atmosphere, children could make pie charts to show the different gases that are emitted from a volcano. Different groups of children could then be challenged to conduct research projects and fact files on each gas. They may be given questions to research such as 'what are the uses of each gas?' and 'what are their unique features and qualities?' Children could use simple experiments to find out how different gases are made, such as evaporation and burning materials.