How can an object be neutral if it contains many particles that have a negative charge?
The number of particles with a positive charge is equal to the number of particles with a negative charge.
True or false?
Electric charges flow easily through insulators such as rubber, wool, glass, and wood. True or False?
False
What will happen when a particle with a negative electric charge is placed near a particle with a positive electric charge?
They will attract
The strength of electric force becomes stronger as electrically charged objects get closer to each other. True or False?
True
A naturally magnetized mineral magnetite, called __________, was used as the first compass. It could turn an iron needle into a magnet, which would always point North. This enabled navigation.
Lodestone
What happens during a static discharge?
Particles with an electric charge move between objects that are not touching.
The strength of electric force becomes weaker as electrically charged objects get closer to each other.. True or False?
False
This is an illustration of Earth's magnetic _______________, or the space where the force of a magnet acts.
Field
Gold, silver, and copper allow electrical charges to move easily. These metals make efficient _______________.
conductors
As opposed to permanent magnets, electromagnets attract magnetic objects only when the electric current is turned on. True or False?
True
Ted wants to use a magnet to hold the door of a playhouse closed. The door and the doorframe are both made of plastic. Ted places a magnet onto the doorframe. Will the magnetic force keep the door closed?
No, because the door is plastic, which is an insulator.
A lightning strike is an example of the transfer of particles that have an electric charge between objects that are not touching. This transfer is called a ____________________.
static discharge
The largest natural magnet on Earth is the planet itself. True or False?
True