Lesson

S'more Power! Engineering a Solar Oven

Lesson Overview

Students will explore how solar radiation can be absorbed and converted into thermal energy, leading to an increase in temperature. They will then apply this understanding to engineer a solar oven using readily available materials, designing it to maximize the transfer of solar energy to cook a s'more, and testing its effectiveness.

Duration
Multiple days
Lesson Type
Project Based Lesson

Essential Question

How can we harness the principles of thermal energy transfer, specifically absorption and reflection of radiation, to design and build a solar oven capable of cooking a s'more?

Grade(s):

Subject(s):

Other Instructional Materials or Notes:

6

For the Solar Oven Structure:

  • Cardboard Box: A pizza box with a lid that closes securely is a common and easy option. Other cardboard boxes (e.g., small appliance boxes) can also be used.
  • Aluminum Foil: To line the inside of the box and the flap to reflect sunlight.
  • Clear Plastic Wrap or a Clear Plastic Bag: To create a transparent "window" to trap heat inside the oven.
  • Black Construction Paper or Black Paint: To line the bottom of the inside of the box to absorb heat.
  • Newspaper or Other Insulation Material: To place around the inside of the box to help trap heat (optional but recommended for better results).
  • Tape: Clear tape, duct tape, or masking tape to secure the foil and plastic wrap.
  • Scissors or Box Cutter: For cutting the cardboard and other materials (adult supervision required for box cutters).
  • Ruler or Straight Edge: To help with measuring and cutting straight lines.
  • Stick or Prop: A ruler, wooden skewer, pencil, or similar object to prop open the reflective flap at an angle.
  • Glue Stick (optional): To help adhere the aluminum foil and black paper to the cardboard.

For Testing (S'mores!):

  • Graham Crackers
  • Marshmallows
  • Chocolate Bars (thin squares work best)
  • Aluminum Foil or a Small Dark Plate/Pie Tin: To place the s'mores on inside the oven.

Optional Materials (for experimentation or more advanced designs):

  • Thermometer: To measure the temperature inside the solar oven.
  • Different Colors of Paper: To test which absorbs heat best.
  • Different Types of Reflective Materials: To compare reflectivity.
  • Additional Layers of Plastic Wrap: To increase insulation.

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