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Review of Fourth Grade STARTING WITH ELECTRICITY Electricity & Materials What are negative charges called? Electricity & Materials Electrons Electricity & Materials A continuous flow of negative charges is otherwise known as what? Electricity & Materials Electricity Electricity & Materials What are the TWO units that are used to measure electricity? Electricity & Materials Voltage and Amperes (Volts and Amps) Electricity & Materials What is the voltage of a common DRY CELL battery? Electricity & Materials 1.5 VOLTS Electricity & Materials What is a DRY CELL? Describe it. Electricity & Materials A dry cell is a type of battery that contains chemicals in the form of a paste. Electricity & Materials What is a WET CELL? Describe it. Electricity & Materials A wet cell is a battery that contains chemicals in the form of a liquid. Electricity & Materials What is a CONDUCTOR ? Electricity & Materials A conductor is a type of material that EASILY allows electricity to flow through it. (Usually a METAL) Electricity & Materials What is an INSULATOR? Electricity & Materials An insulator is a material that DOES NOT ALLOW electricity to flow through it. (usually a plastic or rubber) Electricity & Materials The path taken by an electric current is known as what? Electricity & Materials A Circuit Electricity & Materials What three things must a circuit have to work? Electricity & Materials 1. An energy source (battery) 2. Wire so the current can move. 3. Something to use the electricity. (Light Bulb) Electricity & Materials What is a closed circuit? Electricity & Materials A circuit that can work. (It allows the movement of electricity) Electricity & Materials What is an open circuit? Electricity & Materials It is a circuit that is “broken” or not complete, so the electricity cannot travel completely through. Electricity & Materials What is a SERIES circuit? Electricity & Materials It is a circuit where the electricity only has one path to follow. Electricity & Materials What is a parallel circuit? Electricity & Materials A type of circuit where the electricity has more than one path to follow. Electricity & Materials In a magnet, where is the magnetic force the greatest? Electricity & Materials Around the poles (top and bottom)