Wednesday, September 21, 2016

Solar ovens teach conduction, convection, and radiation

Today was the culmination of an 8th grade science project where students built solar ovens. The goal was to use conduction, convection, and radiation heat transfer to cook a S'more.

Groups of 4-5 students worked collaboratively using limited materials (including black paper, tin foil, cardboard boxes, and a few other items you will see in the photos below). The project is part of a Weather and Atmosphere Unit and is assessed using a rubric (that is education jargon the criteria that are used to measure the project). The project requirements include a written description, a data table, and construction criteria:


  • Oven must cook two s’mores at the same time. 
  • Oven must be no larger than 40 cm x 40 cm. 
  • Temperature inside the box must increase by 15oC in 10 minutes. 
  • Food may not touch the bottom of the oven directly. 
  • The two s’mores must cook at two different heights. 

  Today was a great day for cooking--the ovens in this group were able to go up 24 degrees!
                                         




Ovens were made of a limited number of materials

The temperature of the oven needed to increase by 15 degrees