Electricity
An atom has a nucleus made up of
protons and neutrons
Magnetism is an _______________ __________ between two magnetic objects or between a magnetic object and an object made of magnetic materials.
invisible force
What is the Earth's magnetic field?
A moving magnet can produce electricity with a ...........
turbine
What type of inventions use electromagnets? (not old)
modern inventions.
What are particles that orbit the nucleus?
Electrons
Bar magnets are permanent magnets. This means they can't ___________________________________
be switched on and off
The magnetosphere extends from ....
the South Pole to the North Pole.
The study of how _______________________________________________________ are related and how they __________________________________________ is called electromagnetism.
electricity and magnetism, interact with each other
What uses electromagnets to levitate above its track?
the MAGLEV
The constant movement of electrons betweens atoms is called
The lines and filings of a magnetic field indicate _________________________
the location and direction of the magnetic field.
The centre of the Earth is made of ...
liquid iron
............. noticed that an electric current affects a compass needle.
Oersted
In an electric bell a hammer does what?
hits a bell to produce sound
In a stable atom, there are the same number of
In a diagram to represent a magnetic field, there are more lines, and they are closer together near the poles because
the magnetic field is stronger there.
The magnetosphere is essential to life on Earth because it ___________________________________________ from the Sun back out into space.
deflects solar radiation
Faraday's invention was the basis for the first electric motor or ............
dynamo
Speakers produce sound when the cone __________________________
inside the speaker vibrates.
In a .............. , electricity flows out of the battery through the wire, and back to the battery.
circuit
How can we identify a magnet?
by testing if it is repelled by another magnet.
A compass has a magnetised _______ __________ that is balanced inside a container.
steel needle
One of Ampere's discoveries was the electron, which he called _________________
the electrodynamic molecule.
Microphones work by transforming sound ________________________________________.
vibrations into electricity.