Vocabulary
Magnetism
Electricity
Diagrams
Electromagnetism
100
Any material that attracts iron or materials containing iron.
A magnet
100
The opposite ends of a magnet
North and south poles
100
Magnets have two types of poles, electricity has two types of ...
charges
100
Draw a diagram of a positive charge. Make sure your arrows are pointing the correct direction.
100
How are electromagnets different from permanent magnets?
Electromagnets can be turned on and off
200
The interaction between electricity and magnetism
Electromagnetism
200
Region around a magnet in which magnetic forces can act.
Magnetic field
200
This combination of charges will attract
Opposite Charges
(Positive and Negative)
200
Draw a diagram of the Earth's gravitational field. Make sure your arrows are pointing the correct direction.
200
What three things so we need to create an electromagnet?
A power source (battery), a solenoid (curled copper wire), and a core (iron nail)
300
Moving electric charges
Current
300
Groups of atoms in tiny areas that align when a magnet is nearby. Found in materials such as iron, nickel,cobalt.
Magnetic domains
300
How can we transfer charges from one object to another?
By using forces like friction
300
Draw a diagram showing the magnetic field lines of a bar magnet. Make sure the arrows are pointing in the correct direction.
300
Name two ways to decrease the force of an electromagnet
1) Change to a smaller power source
2) Switch to a smaller, less magnetic core
3) Decrease the amount of loops in the solenoid
400
Device that measures current
Ammeter
400
These ends of a magnet would repel
Similar ends
(North and North) or (South and South)
400
A balloon has 40 negative charges. A piece of wool has 50 positive charges and 10 negative charges. Which one has a stronger electrostatic field?
They both have fields with a magnitude of 40 charges. Even though they are oppositely charges, the fields will be equally strong
400
Draw a diagram of two magnets with opposite poles facing each other. Make sure your arrows are facing the correct direction.
400
How can you turn off an electromagnet?
Open the circuit by detaching one end of the wire from the power source
500
A straight coil of wire
Solenoid
500
The reason a compass needle points to Earth's geographic North Pole.
The Earth's magnetic south pole is Earth's geographic North Pole
500
How can a negatively charged balloon stick to a neutral wall?
The negatives in the balloon attract the positives from the wall and push the wall's negatives away
500
Draw a diagram of two negative charges and their fields. Pay attention to if they are attracting or repelling and which way the arrows should point.
500
Why doesn't static electricity create a magnetic field?
Only moving current creates a magnetic field