Unleash the power of ... blackberries! Science superstars create solar cells using the juice of berries or leaves of a citrus tree in an engaging lab. In addition to offering a plethora of resources, the teacher's guide gives background information and explanations perfect for both middle and high school classes.

Concepts

photosynthesis, voltage, photovoltaic cells, semiconductors, laws of thermodynamics, solar energy, alternative energy sources

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Additional Tags

science

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Instructional Ideas

• Create solar cells from all three recommended substances, then compare results to determine the most powerful or dependable source of electrons
• Challenge pupils to calculate the size of a juice solar cell capable of generating enough voltage to power a lamp

Classroom Considerations

• Prepare titanium-coated slides and iodide electrolyte solution prior to lab day; be sure to take care when storing the slides
• Discuss the mechanism of electron release before beginning construction of the solar cells

Pros

• Contains a helpful presentation and YouTube video link for creating the solar cells
• Prep is easy, thanks to the how-to's, printables, and materials list in the teacher's guide

Cons

• None