Magnets
What is the invisible force surrounding a magnet called?
A magnetic field.
What are the three particles in an atom?
Protons,Neutrons, and Electrons
What are the three types of electric charges?
Positive, negative, and neutral
What is one example of static electricity?
A balloon rubbing on hair, rubbing socks on a carpet.
What three main parts are needed to make a simple electromagnet?
A wire, iron core (nail), and a power source (battery)
What happens when opposite poles of magnets are brought together?
They attract and pull towards each other.
An object has more protons than electrons, what is its charge?
Positive
What happens when two positive charges are brought together?
They repel.
What particle moves from one object to another to create static electricity?
Electrons
What is an electromagnet?
An electromagnet is a temporary magnet made by wrapping a wire around an iron core and running electricity through it.
Two magnets have their north poles facing each other. What will happen?
They will repel and push away.
What is the charge of an atom with equal numbers of protons and electrons?
Neutral
What happens when a positive charge and a negative charge are brought together?
They attract.
What causes static electricity?
An imbalance of electric charges.
How can you make an electromagnet stronger?
Add more coils of wire around the nail.
Where is the magnetic force the strongest on a magnet?
The north and south poles of a magnet.
What charge does a proton, electron, and neutron have?
Positive, negative, and neutral.
What happens when two negative charges are brought together?
They repel.
Why can a balloon rubbed on hair attract small pieces of paper?
The charged balloon attracts the paper.
How can you tell if an electromagnet became stronger during an experiment?
It picks up more paper clips.
What can we use to show the magnetic field lines of a magnet and how do they work?
Iron filings and they work by acting as mini magnets attracting towards the poles of the magnets.
What is the nucleus of an atom and what two particles does it hold?
The nucleus is the center of an atom holding protons and neutrons.
An object has 6 electrons and 10 protons, what is its charge and why?
It is positive because it has more protons than electrons.
When the balloon gains electrons, what charge does it have?
Negative charge
Name three real world objects that use electromagnets
Fan, blender, and doorbell