Electricity
What is the buildup of electric charge on an object called?
Static electricity
What are the two areas of strongest force on a magnet called?
Magnetic poles
The curved path that one object takes around another one because of those two forces acting together.
Orbit
A property of matter that describes how it interacts electrically with other particles.
Electric charge
The force exerted by moving electrical charges on each other or the poles of a magnet; a push or pull that occurs when a magnet interacts with another object.
Magnetic force
Name the two types of electric charge found in atoms.
Positive and negative
What happens when the north pole of one magnet meets the north pole of another magnet?
They repel
The attractive force between any two masses is called...
Gravitational force
A push or pull between charged objects.
Electric force
A magnet created by wrapping a coil of wire with a current running through it around a core of material that is easily magnetized.
Electromagnet
When you rub a comb through your hair and it picks up paper, what property of the comb increased?
Electric charge
Name the type of magnet made by wrapping wire with electric current around a metal core.
Electromagnet
An astronaut weighs less on the moon than on Earth. Why?
The moon has weaker gravitational force.
The continuous flow of electrical charges through a material.
Electric current
A device that transforms electric current into motion using electromagnetism.
Electric motor
In an electric circuit, what device stops the flow of current?
List two ways to increase the strength of an electromagnet.
Adding more coils
Increasing the current
Using a stronger core
A soccer ball is kicked high into the air and falls back down. What causes this?
Any material that attracts iron and materials that contain iron.
Magnet
A device that transforms motion energy into electrical energy.
Generator
If you rub a balloon with wool 20 times instead of 5 times, how does the electric force change?
It becomes stronger
A compass needle uses Earth's magnetic field to provide direction. This means when a compass points north, it is pointing towards Earth's magnetic ________________ pole.
South
What two factors determine the strength of gravitational force between objects?
1. Mass
2. Distance
The region around a magnet where magnetic force is exerted.
Magnetic pole
An attractive force between any two masses, even when they are not in contact.
Gravitational force