```Thermal Energy Transfer - Conduction                Eileen Wild                    Retired                           Objectives:To examine the thermal energy transfer through a pane glass window and to clarify the physical definitions of heat and thermal transfer. Background:Mies van der Rohe, the architect for the IIT campus was known for his extensive use of glass.  Many of the campus buildings are oriented in a North-South direction with the major windows facing either East or West.  These windows therefore receive either the morning or afternoon sun.Materials Needed:Thermometers, transparencies, copper rod, flame source, overhead projector, bubble raft Demonstrations:Thermal transfer through a copper rod, bubble raft analogy of a solidStrategy:You are going to measure the energy transfer occurring through the windows oriented in each direction.  Choose buildings with good air conditioning.  The greater the temperature difference, the better the results.The following date is needed for your computation-.area of the glass window.inside temperature.outside temperature.glass conductivity K= .84 J/s.glass thickness-assume l = 10-3

Substitute the above data into the following formula.
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`Performance Assessment:Students are required to reproduce this exercise on windows of their own dwelling.  The results of their personal investigation solidify their knowledge of energy transfer.               `