Intro and Scientists
What do you call permanent magnets, meaning they can't be switched on or off?
Bar magnets
This is what we call the Earth's magnetic field.
magnetosphere
Aside from electromagnetism, what are two other ways electricity effects matter?
thermal energy and chemical reactions
Electric bells use this to function.
electromagnetism
What are inside a nucleus and have a positive charge?
Protons
What are the two poles of a bar magnet?
North and South.
What is the Earth's core made of?
liquid iron
True or false: as electric currents travel through a wire, very little thermal energy is produced because a wire is made of copper.
true
This stands for magnetic levitation.
maglev
What orbit the nucleus and have a negative charge?
Electrons.
We can see the magnetic field of a bar magnet by using these.
Iron fillings
What causes the magnetosphere?
liquid iron in the core moving slowly as the earth rotates on its axis
This is a chemical reaction that is produces when an electric current flows through a liquid solution of charged particles.
electrolysis
A train that uses magnets to move forward.
maglev
Electricity and magnetism are tow aspects of this force.
Electromagnetism
In a diagram of a magnetic field arrows point in this direction (hint: from _______ to _______________)
North Pole to the South Pole
This is actually the south pole of the magnetosphere.
North Pole of Earth
During electrolysis the positively charged atoms in the solution are attracted to this.
negative electrode
They work by transforming sound vibrations into electricity.
microphones
Who discovered that in addition to producing thermal energy, electric current produces a magnetic field?
Hans Christian Oersted
Two north poles of a magnet will do this to each other.
repel
The magnetosphere is essential to life on Earth because it deflects this.
solar radiation
As a result of electrolysis the liquid solution is transformed into how many separate substances?
two
In a speaker what vibrates to produce sound.
cone