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Script: What is electricity? Where does electricity come from? • • • • • Atoms contain particles that have charge Positively charged particle = proton Negatively charged particle = electron Neutral or particles with no charge are called neutrons Protons and Neutrons are found in the nucleus of the atom. What causes electricity? • Most of the time atoms are electrically neutral meaning they have equal numbers of protons and electrons • Neutral atoms have an overall charge of zero. • Since electrons are free to move from atom to atom some atoms are left with more protons than electrons making them positively charged atoms. • Other atoms gain electrons giving them a negative charge. • The movement of this electric charge generates electricity. Electric Charge • A charge is a measure of the extra positive or negative particles that an object has. • When charge is separated static electricity results. • The positive charge always stays on an object & the negative charges move to other atoms when charge becomes separated. Example • When you rub a balloon on your head, you remove electrons from your hair and leave protons in your hair. • Since like charges repel, the strands of hair begin to push away from each other. • If you bring the negatively charged balloon back close to your hair, it will stick to the balloon. • Unlike charges like that on the balloon and in your hair attract one another. What exactly is Electricity? • Electricity is the flow of electric charge in wires, motors, light bulbs, and other devices. • Electric current carries the energy (the charges) over great distances. • The current moves along a wire or a path called a circuit.