What's inside of the second coil? Which coil acts as a stronger magnet? Which one is an electromagnet?
The coil with the iron rod inside is a stronger magnet. It's an electromagnet because it's magnetic only when an electric current passes through the coil.
20
Electricity produces ... and magnetism produces ...
magnetism; electricity
10
This is one type of ... How does it work? (Hint: explain what moves)
electromagnetic generator; The magnet moves inside the coil, which produces electricity.
15
This is one type of... How does it work? (Hint: explain what moves)
electromagnetic generator; The coil turns between two magnets, which produces electricity.
15
When the LIKE poles of two magnets come close, they will...
repel each other
10
When the UNLIKE poles of two different magnets come close, they will...
attract each other
10
This mineral is an example of a ... magnet. It's called...
natural; magnetite
15
Explain what happens when you cut a magnet in half. (Hint: think about the poles)
It creates smaller magnets with two different poles
15
What is the name for the invisible area around a magnet (where the magnet can attract and repel)?
the magnetic field
10
Imagine you're holding a compass. 1) Which GEOGRAPHIC pole does the needle point to? 2) Which MAGNETIC pole does it point to?
1) north 2) south
15
What is the Earth's core composed of? This makes the Earth act like a giant...
a mixture of very hot iron and nickel; MAGNET!
15
Which of these machines use electric motors?
blender, toaster, washing machine, microwave, hairdryer, and fan!
10
What does the hand mixer use to work? What parts does it have?
an electric motor; a coil between 2 magnets
15
Electric motors transform ... energy into ... energy (movement).
electrical; mechanical
15
True or false? Wind turbines use electric motors to work. Justify your answer.
False! Electric motor = electric current -> movement; electric generator = movement -> electric current