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1、Potato BatteryGrade Level: 6Strand: Understanding Matter and Energy Topic: Electricity and Electrical DevicesLesson Expectation: Design, build, and test a device that produces electricity (e.g., a battery built from a lemon or potato; a wind turbine)Required Materials:- 3 potatoes- 4-6 pennies (copp
2、er pennies)- 4-6 galvanized nails (or zinc nails)- 8 alligator clips- Copper wires- Low-voltage calculator or low-voltage light bulbProcedure:1. Insert a galvanized nail into each potato2. Insert a penny into each potato. Be sure to keep the penny away from the nail (not touching)3. Wrap the ends of
3、 a copper wire around an alligator clip (2 alligator clips per one piece of copper wire). Do this until all the alligator clips are connected to copper wire. 4. Connect an alligator clip to a galvanized nail in potato 1; attach the other alligator clip to a penny in potato 2. Then connect the alliga
4、tor clip to the galvanized nail in potato 2 and attach the other end of the alligator clip to the penny in potato 3.5. All the potatoes are connected by wires. Connect an alligator clip to the galvanized nail in potato 3 and connect the other end to the negative end of the calculator.6. Attach the l
5、ast set of alligator clips to the nail in potato 1 and to the positive end of the calculator7. With the circuit complete the calculator should turn onScientific Explanation: A potato contains chemical energy. An electrochemical cell converts chemical energy into electrical energy. A type of electroc
6、hemical cell is the potato battery. This is due to the transfer of electrons between the zinc nail and copper penny. The potato transfers the electrons (conducts electricity), but keeps the zinc ions and copper ions separate. This separation forces the electrons to transfer over the copper wires (ge
7、nerate current). This then channels the energy into the clock.If the zinc ion and copper ions touched they would react but would only generate heat. The potato battery does not contain enough power to shock a person, but can power small electronics.Other considerations: Other foods can also act as a
8、n electrochemical cell. Try using citrus fruits, pickles, or cola. Definitions: Electricity energy created by moving charged particles (such as electrons, positrons, and ions) Electrons elementary particle; a stable negatively charged elementary particle with a fundamental constituent of matter and
9、orbits the nucleus of an atom Chemical energy the energy released or absorbed during the decomposition or formation of compounds Electrical energy - is the presence and flow of an electric charge Electrochemical cell - is a device capable of either deriving electrical energy from chemical reactionsSources:By: George Franko & Meagan Warnock
