Electricity Review

Forms of Energy Mechanical Energy Chemical Energy

What is the difference between kinetic energy and potential energy? A.An object has potential energy because of its position or condition. It has kinetic energy when it is moving. B.An object can go from having potential energy to having kinetic energy but not the reverse. C.Living things have kinetic energy. Only non-living things such as books can have potential energy.

When does an object have the most potential energy on a roller coaster? A.When it is at the top of the roller coaster. B.When it is going to the top. C.On its way down the roller coaster. D.Going up the second hump of the roller coaster.

Kinetic and Potential Energy Stored and Moving Energy Energy makes everything happen and can be divided into two types: Stored energy is called potential energy. Moving energy is called kinetic energy. With a pencil, try this example to know the two types of energy. Put the pencil at the edge of the desk and push it off to the floor. The moving pencil uses kinetic energy. Now, pick up the pencil and put it back on the desk. You used your own energy to lift and move the pencil. Moving it higher than the floor adds energy to it. As it rests on the desk, the pencil has potential energy. The higher it is, the further it could fall. That means the pencil has more potential energy. Kinetic and Potential Energy Video Clip (2 min) Potential Video Clip (45 sec) Kinetic Video Clip (45 sec)

What happens when you throw a baseball? A.You give it thermal energy B.You give it kinetic energy C.You give it potential energy D.You give it chemical energy

What is elastic potential energy? A.Energy stored as a result of the deformation of an object such as a spring. B.Energy that goes in and out. C.Energy that stretches to numerous objects. D.Energy that bounces back.

Energy can not be created or destroyed, only changed from one form to another is the law of… A.Energy Review B.Thermal Energy C.Preservation of Energy D.Conservation of Energy

In series circuit with two lights, what happens if one bulb goes out? A.The other bulb stays lit. B.All bulbs go out. C.Nothing happens. D.The battery is dead.

Series Circuit

The lights in our classroom are wired in what type of circuit? A.Open B.Series and Parallel C.Series D.Parallel

Parallel Circuit

What is a pathway along which electrons flow called? A.Switch B.Current C.Circuit D.Resistor

The flow of energy in an electrical circuit is referred to as… A.Circuit B.Conductor C.Electromagnet D.Current

What form of energy gives us direction? A.Electrical Energy B.Thermal Energy C.Solar Energy D.Magnetic Energy

What is an electromagnet? A.An electric field that attracts objects similar to the way a magnet attracts metal objects. B.A coil of current conducting wire wrapped around an iron bar. C.A very large magnet. D.A magnetic field that is produced when static electricity builds up in the atmosphere.

How does the number of times a wire is wound around an iron core affect the amount of iron filings the electromagnet will pick up? A.Increase B.Decrease C.Nothing D.Stays the same. Number of WindsNumber of Filings

How is an electromagnet different from a bar magnet? A.The electromagnet can be turned on and off. B.The bar magnet can pick up most metal objects. C.The electromagnet can pick up iron filings. D.The bar magnet has a magnetic field.

Which of the following is attracted to a magnet? A.Metal B.Gold C.Aluminium D.Plastic

Electromagnets

Lighting illustrates - A.A build-up of electrons in the air B.A build-up of heat C.Heat flow D.How the ground can become a temporary electromagnet.

Static Electricity

What do rubber, plastic and glass have in common? A.They are all good insulators B.They are all good conductors of electricity. C.They can all be turned in to magnets. D.They are all capable of building up static electricity.

Which group contains items that could all conduct electricity to complete the circuit? A.Rubber Ball, Plastic Comb, Nail B.Paper Clip, Penny, Iron Screw C.Cork, Dollar Bill, Tweezers D.Pencil, Eraser, Spoon

ConductorsConductors & Insulators

What does a toaster, light bulb, radio, computer have in common? A.They have to be replaced often. B.They all convert electricity to heat. C.They all convert electricity to different forms of energy. D.They are all forms of static electricity.

What causes chemical energy to be changed to electric energy in a flashlight. A.Inserting the batteries. B.The heating of the light bulbs filament. C.Flipping on the switch. D.Screwing on the top so that the batteries form a connection.

Converting Energy

The type of energy created by the sun is called… A.Magnetic Energy B.Solar Energy C.Electrical Energy D.Sound

Solar Energy

What kind of circuit is this? A.Series B.Parallel C.Current D.Circuit

In this type of circuit, what happens when a bulb is removed? A.All bulbs stay lit. B.The battery goes dead. C.The third bulb disappears. D.All bulbs go dead.

What type of circuit is this? A.Light Energy B.Series C.Current D.Parallel

Why won’t this circuit light? A.There is a conductor in the way. B.There is an insulator in the way. C.The battery is not hooked up right. D.The light bulb is burned out.

Why can’t a parallel circuit be used to test materials for conductors? A.There are too many bulbs. B.When you take one part of the circuit out the others stay lit. C.When you take one part of the circuit out all others turn off. D.Circuits can’t be tested.