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.
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):
Recommended Technology:
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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