Science+Chapter+16,+ELECTRICITY

Electricity is a form of energy that plays an important role in our live
I. How are Electricity and Magnetism Related? A. Electricity 1. Atom’s are made up of that are positively charged 2. Atom’s are made up of electrons that are charged 3. Atom’s with more electrons than protons are _____charged 4. Electron movement produces _ 5. Electricity can change to other forms of energy like light, mechanical, _, _ B. Electricity and Magnetism 1. Electromagnet is made by running through a wire 2. The wire with electricity running through it makes a _ field, 3. Magnets can produce 4. A generator is coil of wire turned inside a huge magnet producing electricity. Generators at power stations produce the energy we use at school and home. C. Electric Motors 1. made of a coil of wire that spins inside of a magnet 2. to see how a motor works go to http://www.harcourtschool.com/activity/science_up_close/520/deploy/interface.html D. Summary: Electricity is a form of energy that is very useful. Electromagnets make energy flow. E. II. What are Static and Current Electricity? A. Static Electricity a. Atoms with same number of protons and electrons are neutral b. Atoms with unequal numbers of protons and electrons have -elecricity c. Positive charges and negative chargers _-each other d. Negative charges and negative charger each other e. When Electrons move to balance the charges, you get a spark called static _ f. When electrons jump from one part of a cloud to another, we get _ B. Current Electricity 1. A steady flow of electron through a path is __electricity 2. Electrical pressure on the path is measured in__ _ 3. The rate at which electrical charges flow is measured in _ 4. Amount of electrical energy a device uses is measured in _ __5. 1000 watts = 1__ _ __C. Conductors and Insulators 1. Electricity moves well through__ 2. Electrons do not move well through wood, glass, rubber. They are _ __3. Wires get__ _ when electricity flows through them D. Summary: Static electricity is a buidup of charges on an object. It can be discharged ina short burst of kinetic energy. Current electricity is more useful because it is constant and can be turned off and on.

III. What are Electric Circuits? A. Series Circuits 1. The path an electric current follows is an electric circuit 2. For current to flow, need two things power source & no breaks in current flow 3. Series circuits have only one path for electrons to flow 4. In series circuit, if one light goes out all the rest of the lights go out. B. Parallel Circuits 1. Electrical paths with more than one way for electricity to flow are parallel circuits 2. Each item on the path has its own circuit to power source 3. Two advantages to parallel circuits : a) If one device on a circuit is unplugged, the rest stay on b) If you add another light to the circuit, all other light stay bright C. Drawing Circuits 1. Engineers draw diagrams to plan and show circuits 2. Diagrams include symbols for power source, wires, switches, lights etc. D. Summary: In a series circuit, electricity flows from one device to the next in a circle. In a Parallel circuit electricity flows to each device separately and back to the source of power. Engineers have specific symbols for the components of circuits. IV. People in Science A. Herta Marks Ayrton studied electric current that flows through a gas B. Meredith Gourdine invented a system for removing smoke from burning buildings & fog from runways by giving them a negative charge

VOCABULARY Lesson 1 Electricity __Electromagnet__ Lesson 2 Static electricity_ Electric current _ Current electricity _ __Conductor__ _ __Insulator__ Lesson 3 Electric circuit __Series circuit__ _ Parallel circuit __