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Potato Battery Activity

Potato Battery Activity. Potato Battery Activity. Part 1: Engage How does a battery power something? What is a battery made of? What happens inside the battery that allows the electricity to come out of it? Why does a battery stop working? What gets used up?

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Potato Battery Activity

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  1. Potato Battery Activity

  2. Potato Battery Activity • Part 1: Engage • How does a battery power something? • What is a battery made of? • What happens inside the battery that allows the electricity to come out of it? • Why does a battery stop working? What gets used up? • What kind of energy does a battery contain and what kind does it create? • Chemical, electrical, mechanical?

  3. Potato Battery Activity • Part 2: Explore • Supplies: • 2 potatoes • 2 pieces of copper wire • 2 nails • 3 alligator clips • 1 LED

  4. - + Potato Battery Activity • Part 2: Explore • Set-up: • Connect copper wire to + end and nail to –end of LED • Does the LED light up? How can we get more voltage?

  5. Potato Battery Activity • Part 2: Explore • Now make a series of connected batteries • How many potatoes do you need to power the LED? • What happens when you: • Change the direction of the LED? • Use only nails or only pennies? • Connect the potatoes in parallel?

  6. e- Potato Battery Explanation • Part 3: Explain • Does the potato actually power the clock? • What happens to the copper wire and zinc nail over time?

  7. Potatoes contain mild phosphoric acid (H3PO4)! Potato Battery Explanation • Part 3: Explain • What is the chemistry behind the reaction? • Oxidation at the zinc electrode: • Reduction at the copper electrode:

  8. Potato Battery Activity • Part 4: Evaluate • Could this work with other vegetables or fruits? • Is a potato a good alternate energy source?

  9. Potato Battery Activity • Part 5: Elaborate • What makes a battery stop working? What gets used up?

  10. Potato Battery Activity • Part 5: Elaborate • What else uses this type of chemical energy? • All batteries • Fuel cells http://www2.wwnorton.com/college/chemistry/gilbert/tutorials/ch17.htm

  11. Potato Battery Activity • Part 6: Summarize • Describe the energy transformation ? ? ?

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