It’ll Move You!!

 We know there are ____ types of electricity: 1. ______________ Electricity – where electrons build up an electric charge on a substance by _____________, _____________, or ____________. These electrons ____________ travel in a wire. Not useful for operating electrical devices because they do not flow continuously. 2. ______________ Electricity – where an electric charge moves from a source of electrical energy along a ________ in an electric _______________. The electrons must have a complete path, or circuit to flow through to flow continuously.

 This is a package of ____________that converts chemical energy into electrical energy that is stored in charged particles.  A simple one includes an ______________ and two _________________. _______________: liquid/paste that conducts electricity because its chemicals form ____________.  e.g.: citric acid _______________: __________________, usually one each of zinc and copper, that react with the electrolyte. Zinc becomes negative, copper becomes positive  A _________________ is a combination of electrochemical cells.

 ____________________  An electrochemical cell that has a ___________ electrolyte.  Often used for vehicles.  ____________________  An electrochemical cell that has a ____________ electrolyte.  Often used in flashlights, PSPs, cameras, watches, etc.  ____________________  An electrochemical cell that generates electricity directly from a chemical reaction with a fuel that is continuously added.

 Eventually the chemicals in a dry cell are used up and can no longer _________________ the charges onto the metal strips.  Over ______% of heavy metals (nickel, cadmium, lead) found in landfills are caused by household dry cells and batteries.  Recharging batteries _______________ the chemical reactions in a cell and restores the ________________ that are used up when the cell produces electricity.  Since they can be reused many times, this means there is less impact on the environment --

 Purpose: to discover how to make flashlight bulbs light up using a standard battery.  Materials: 1D dry cell, 5 insulated copper wires with both ends bare, 2 2.0V-flashlight bulbs

 Procedure: 1. Use wire and the dry cell to make one bulb light up. Record/draw your arrangement. 2. Use wire and the dry cell to make two bulbs light up. Record/draw your arrangement. 3. If time allows, try other arrangements for step 1 and step 2.

 The tallest person in your group will record your answers to the following questions, while the shortest person will read them out to the class. The middle person will need to know how to draw a diagram on the board if asked. 1. Explain how to use wire and a dry cell to make one bulb light up. Include a labelled sketch in your answer. 2. Explain how to use wire and a dry cell to make two bulbs light up. Include a labelled sketch in your answer.

 An electric circuit controls the flow of __________ ______________.  There are _____ parts in a simple electric circuit: 1. A _____________ of electric energy which supplies the current. 2. An ______________________ to convert electrical energy to a different type of energy. 3. A _______________________ to control the flow of electric current. 4. A __________________________________ to connect all parts of the circuit together.  Use the labels given to you to label 3 of the 4 parts of the circuit.

 In the circuit we made in the Quick Lab, which parts correspond to the:  Source?  Control switch?  Conductor?  Load?

1. How is current electricity different from static electricity? 2. What is an electric circuit? 3. List three components of an electric circuit. 4. What is the difference between an electrolyte and an electrode? 5. Why should dry cells be recycled rather than thrown in the trash?