Magnetism
What is magnetism?
A: A force that attracts or repels objects of certain materials due to electric charges.
C: A type of invisible light that can change the colour of objects.
A: A force that attracts or repels objects of certain materials due to electric charges.
What is a magnetic field?
A magnetic field is an invisible force field generated by a magnet
What material is usually in the middle of an electromagnet
iron
From what pole does the magnetic field of a bar magnet go out of and then into?
North to South
What is the name of the crystals that are inside of some animal’s body which causes them to sense electromagnetic waves?
Magnetite crystals
How are solenoids made?
An iron rod wrapped with copper wire
What three things can you do to increase the strength of an electromagnet?
Increase the amount of coils, add an iron core, and increase the voltage.
Select the following that use magnetism:
Planes
shower head
phones
Birds
Trains
All of them
Why are maglev trains faster than normal trains?
Because they reduce friction
Are magnetic structures destroyed when overheated?
Yes
If you have a bar magnet, which part of the magnet is the strongest in terms of its magnetic field?
The strongest part of a bar magnet is at its poles.
Who is your fav teacher
Miss Bardell
True or False, Magnetis fields do from South to North within the bar magnet
True
How do opposite poles of a magnet interact?
Opposite poles attract (stick together)
How does could magnetic field negatively affect migration?
disturbances to Earth's magnetic field can lead birds astray.
How do birds use the Earth's magnetic field to find their way during migration?
Birds use special cells in their beaks and eyes that can sense Earth's magnetic field
Which of the following materials is NOT attracted to a magnet?
a) Iron b) Steel c) Aluminium d) Nickel
C: Aluminium
Which is not a reason for animals to migrate?
a. warmer weather,
b. better food supply
c. they're following the group
d. safe place to give birth.
C They're following the group
What happens when you bring the north pole of one magnet close to the north pole of another magnet?
They Repel
How do animals use magnetism for migration?
C: They use fur to attract magnetic particles and float through the air.
B: They sense Earth’s magnetic field to guide their direction.
How do scientists study how animals use magnetic fields to migrate?
by changing magnetic conditions in controlled environments or using GPS trackers.
t what time of the year do geese migrate?
winter
summer
spring
autumn
A: Winter
How many Actual poles are there?
4 North, South, Magnetic North, Magnetic South
What materials are attracted to magnets?
Iron, nickel, and cobalt are attracted to magnets
What element is made to make the strongest magnets?
Neodymium.