Once you finish the procedure 1-8, pick one of the extension procedures below and try it. If possible, complete both.
- Explore whether or not electricity can travel through liquids. You will need kit “A”. This kit includes a solution of salt water, a solution of sugar water, a solution of distilled water, and paper clips. Only connect the wires to the paper clips as to not corrode the wires by getting them wet. Draw one of your setups and answer the questions below.
- Explore the energy that plants have stored in them and try to figure out how to extract electricity from lemons and potatoes. For this procedure, only use the lemon/potato, copper and zinc metals, wires, and the voltmeter.
Note to teachers on differentiation: After the designated time, all of the class will have finished procedure 1-8 and some of the class will have completed this extension section. Have the students that completed the extensions explain their findings to the rest of the class so everyone can learn from their experimentation.