Magnetism
Electricity and Magnetism
Atoms
More Magnetism and Electricity
The Big Bang
100
Which of the following is a permanent magnet?
a relay
a fridge magnet
an alarm bell
a fridge magnet
100
when electrical charges flow in a current they create a
Magnetic field
100
these are made up of Protons, Neutrons and Electrons
Atoms
100
Roman is using a bar magnet in an experiment to determine how its magnetic field lines look. He accidently drops the magnet, breaking it in two. He picks up both pieces and modifies his experiment to determine what happened to the magnet when he dropped it. What will happen to the magnetic field lines?
Both pieces of the magnet now have north and south poles and there is an attractive magnetic force between the two pieces where they broke that will be visible in the field lines.
100
The two lightest and most abundant elements in the universe are:
Hydrogen and Helium
200
this is the area of affect around a magnet and is determined by the strength of the magnet
magnetic field
200
what creates an electromagnet
current flowing through a wire. especially when wrapped around a Farris material
200
this is what happens when there is an imbalance in the number of electrons and protons in an Atom
the atom has a charge or is positive or negative
200
this is the attractive or repulsive force between two poles
Magnetism
200
This is the accepted scientific model explaining how the universe began from a hot and dense compressed point:
The Big Bang Theory
300
magnets always have a north and a south pole. never just one or the other. True or False
True
300
what happens to an electromagnet if you wrap a wire around the bar more times?
the strength increases
300
Within an Atom this carries a positive charge
Proton
300
Vanessa is investigating how magnets react with each other. She holds an unmarked bar magnet in each hand and moves them closer together. As she moves the magnets closer together, she feels the magnets being pushed apart. Which poles of the magnets are most likely facing each other?
either both north or both south (same poles)
300
What is the hot, dense and compressed point called:
A singularity
400
What is this showing? 
Repulsion
400
electromagnets are _________ magnets, in that that dont always have a magnetic field
temporary
400
Within an Atom this carries a negative charge
Electron
400
this is the force created by the combination of electrical and magnetic forces
electromagnetism
400
Scientists estimate our universe is about this old:
13-14 billion years old
500
What is this showing?
Attraction
500
what are common usages for electromagnets
Motors, generators, MRI machines, electric bells and buzzers.
500
This particle has no charge at all.
Neutron.
500
what are the only two types of electric charge?
Positive, Negative
500
As the universe expanded right after the Big Bang, it is believed it underwent this physical change (think about temperature)
Started cooling
600
Name something that can effect the strength of magnetic force
Distance,
Strength of the magnet (how uniformly the electrons are spinning)
the type of material the magnet is made from
600
this is the rate of flow of charged particles
Electric Current
600
positively charged and negatively charged atoms are _________to each other
Attracted
600
Awhina is constructing an electromagnet to demonstrate at the upcoming science fair. She is using wire, a nail, and a battery.
She is using identical materials to create three different electromagnets of varying strength. How can the same materials be used to create a stronger electromagnet?
Add more loops of wire around the nail to increase the magnetic field or make the loops closer together.
600
According to the expanded universe idea, it appears the distance between galaxies is:
Growing