Gravity
Is gravity attractive or repulsive?
attractive
static electricity
Are magnetic forces repulsive or attractive?
they are BOTH
A magnet can be made by running ____________ through a wire.
current, electric current
A device that converts mechanical energy into electric energy is a
generator
Where does gravity pull objects on Earth?
Toward the center of Earth
What kind of charge does a neutral object have?
an equal amount of both positive and negative charges
If two south poles of a magnet are pointed at each other will they attract or repel?
repel
Increasing the voltage source will
increase the strength of the magnet
Increasing the distance from a magnet _________ the force.
What does weight measure?
the amount of gravitational force on an object
False, they are both repulsive an attractive.
Do opposite poles of a magnet attract or repel?
attract
True/False. Electromagnets are temporary.
True, they can be turned on and off.
When an object gains electrons due to friction, what is its charge?
Negative
What is mass?
The amount of matter an object is made of
Do like (the same) poles attract or repel each other?
repel
The core of the Earth creates a magnetic force. True or False?
TRUE
iron, nickel, cobalt
A device that converts electrical energy into mechanical energy.
motor
What two factors determine the strength of the gravitational force between two objects?
mass and distance
The flow of particles with an electric charge.
Current electricity
Can a north pole of a magnet exist without a south pole?
no
Name two real-world uses of electromagnets.
What three things did you need to build an electromagnet?
battery, wire, and a core