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Enduring Understandings

 * ===PDE Standards=== || ===PDE Anchors=== || ===PDE Eligible Content=== ||
 * 1.1.1.X || X.1.1 || X.1.1.1.1 ||

Enduring Understandings
The electrical appliances in our homes an offices need a supply of energy to work. The supplier of that energy, the power company, consumes energy at a remote location and sends it through electrical wires to our appliances.The process usually starts with an energy source found in nature, uses it to turn a crank on an electrical generator, and adjusts the voltage at different stages. There are mathematical relationships between the voltage, the current (or amperage), power (or wattage), and the size of your bill from the electrical utility.