Show:
Magnets
Electricity
Electric currents
Electromagnets
Generators
100
At the poles
What is where magnetic fields are strongest?
100
copper
What is a good conductor we use for wires?
100
An electric current
What is when charged particles are moving along a path?
100
electromagnet
What is something made of coils of wire wrapped around an iron core connected to a power source?
100
Generator
What is a machine that produces electricity?
200
repel each other
What is what two positively charged objects will do when they come near each other?
200
insulator
What is a material called that conducts electric currents poorly?
200
series circuit
What is a type of circuit with only one path for electricity to flow?
200
Shared them with other scientists
What is what Michael Faraday did with his discoveries about electricity and magnets?
200
magnet & wire
What are two main parts of a generator?
300
attract each other
What is what happens when two objects with opposite charges come near each other?
300
static electricity
What is when positivie and negative charges no longer balance?
300
All the bulbs will go out
What is what happens in a series circuit when one bulb goes out?
300
doorbell, electric motor, earphones, microphones, cell phones
What are two devices that have electromagnets in them?
300
electrical energy
What is produced when coiled wire is spun around a magnet?
400
The needle reacts to the Earth's magnetic north pole.
What is why a compass needle point to the north?
400
negative particles
What is the type of particles that gather near the bottom of a storm cloud?
400
switch
What is the part of an electric circuit that opens & closes the circuit?
400
More coils, Bigger (or more) batteries (electricity), Bigger iron core
What are three ways to increase the strength of an electromagnet?
400
wind, water, nuclear, solar, steam energy
What are two sources of energy that generators use to create electricity?
500
Each magnet will have it's own north and south pole.
What is what happens when you break a bar magnet in half?
500
light & heat
In a lightbulb, electric enegry changes into what two other kinds of energy?
500
1. Can operate appliances (things) that use different amounts of electricity. 2. Some things can be turned off while other things stay on.
What is two reasons modern homes use paralle circuits?
500
magnetic, mechanical
Doorbells use electromagnets to help convert elctric energy to -------- and -------- energy. (fill in the blanks)
500
The magnet has a magnetic field and when the coils of wire are spun around it (or the magnet is moved back & forth), it creates an electric current.
What is the imporatance of a magnet in a generator?