5What charge is an atom with more electrons than protons? Negative Charge
6What do atoms with opposite charges do? Attract each other
7Where are electrons located? Moving around the outside of the nucleus
8What is a neutral atom?The number of protons equals the number of electrons. NO CHARGE
9What if the number of protons and neutrons are not equal? Then there will be some kind of charge.
10What does the movement of electrons produce? Produces electricity
11What is a form of energy produced by moving electrons, also known as electrical energy? Electricity
12What is electricity used for? Run lights in homes, schools, offices, street and traffic lightsToaster and electric ovens produce heat from electricityHomes are heated by electricityRadios
13What are the four types of energy can electricity change into What are the four types of energy can electricity change into? Give examples.Light EnergyMechanical EnergyHeat EnergySound Energy
14What is a magnet made by coiling a wire around a piece of iron and running electricity through the wire?electromagnet
15How does electricity make magnetism? When electricity flows through a wire, it makes a magnetic field around the wire.
16When can electromagnets be very useful? They can be turned on and off
17Where else can electromagnets be used? Hold heavy fire doors openFor cranes in steel recycling centersLift metal objects off of ships
18What are the two main parts of a motor? The coil of wire and a magnet
19How is an electric motor like an electric generator? They both involve a spinning coil
20How is an electric motor different from an electric generator? The electric generator=Turns spinning motion (mechanical energy) into electricityThe electric motor=Turns electricity into a spinning motion
21What is the buildup of charges when the number of protons and electrons are no longer equal? Static electricity
22Why do clothes stick together when you pull them out of a dryer? When clothes are in the dryer and rub together, some have a positive and some have a negative charge.This causes them to stick together.
23What is the shock you feel when you pull off a sweater? Static discharge
24Why is there a static discharge? This is when electrons are moving around to try and balance out the charges and make them neutral.
25How does lightning have a static discharge? Collisions between water droplets in a cloud cause the drops to become charged.Negative=BottomPositive=TopElectrons jump causing lightning
26What causes thunder?The lightning heats the air, causing it to expand. As cooler air rushes in to fill the empty space, you hear thunder.
27How is static electricity considered potential energy? Energy is stored and a static charge builds up.
28There needs to be a steady flow of electrons. Why isn’t a static discharge a good energy source since it is kinetic energy?A very short burstThere needs to be a steady flow of electrons.
29When electrons have a path to follow, they will move in a steady flow instead of building up a static discharge. This is known as?Electric Current
30Electricity that is a kind of kinetic energy as stated above is considered? Current Electricity
31What is needed to keep currents flowing? A constant supply of electrons is needed.
33How many volts can one lightning strike have? 1 billion volts of electricity
34What is the rate at which electric current flows measured in? Amps
35What do we call the measure of electric energy used by an electric device every second? Watts
36Since watts are very small units, what is electrical use measure in? kilowatts
37How many watts is one kilowatt? One kilowatt = 1,000 watts
38What should wires with electricity flowing through them have on them and why? Plastic around wire to work as an insulator against the electrical current
39What is the path an electric current follows? Electric circuit
40What two things does an electric circuit need for a current to flow? Needs a source of current, or electronsCircuit has to be complete
41What if there is a break in the circuit? The current will not flow.
42What happens when a circuit is on? The circuit is completeLights come on
43What happens when a circuit is off? Breaks the flow of currentLight goes out
44What circuit has only one path to follow? Series Circuit
45What will happen if you remove any part of a series circuit? Breaks the circuit, and current stops flowing
46What would it be like to have series circuits at home? All electric devices would have to be switched on all the timeIf you unplugged a radio, all the lights in your home would go out!
47When was series circuits used? Light signs, scoreboards, string of Christmas lights
48What circuit is more convenient because it has more than one path for currents to follow? Parallel circuit
49Give some examples of parallel circuits. You are able to turn certain items off and on without turning everything in a building off and on
50Why does parallel circuits have a huge advantage over series circuits? If one appliance is turned off, the others stay on.You can connect more devices by using a parallel circuit.In a series circuit, lights will become dimmer if too many lights are added.
51What do engineers have to do when they are designing a new design for a building or item? Draw diagrams
52What is shown in a simple series circuit diagram? Light bulb and a battery
53What is shown in the circuit diagram of car electrical circuits? Many different symbols and wires