In groups ask students to research ways of using the Sun's energy: * solar cells; photovoltaic and photoelectric cells: www.energex.com.auswitched_onactivitiesphotovolaticphotovoltaic.html
* find local houses with solar heating systems on the roof.
* solar furnaces - see www.darvill.clara.netaltenergsolar.htm
* solar towers, being developed in Australia. www.enviromission.com.au Using solar cells, for example from Middlesex University Teaching Resources - www.mutr.co.uk - carry out an investigation into how to generate the greatest electrical output from the cell.