Properties of Magnets
Magnetic Forces
Properties of Electric Forces
Electric Forces
Other Forces
100
Name the two poles of a permanent magnet
North & South
100
Magnetic forces are strongest when they are
a. closer to an object
b. further from an object
c. always the same
a. closer to an object
100
This type of electric charge has this symbol (+) which is addition in math
Positive charge
100
Just like magnetic forces, electric forces can _______ or _______ an object.
Push or pull
100
A force is a ______ or a ________
Push or a pull
200
Name two poles of a magnet that are unlike
North & South
200
What will happen if you bring the north pole of one magnet near the south pole of another magnet?
The magnets will pull together
200
Which of the following sets of charges will attract each other?
2 & 3
200
Based on what you know about the strength of magnetic forces, which balloon would likely pick up more pieces of paper?
Balloon C
200
This force always pulls us down and keeps us on Earth
gravity
300
This type of magnet uses electricity to create a magnetic force
Electromagnet
300
Name two poles of a magnet that will repel or push away from each other
North + North or South + South
300
Which of these events is caused by electric charges?
a. an earthquake
b. a lightning strike
c. a snowstorm
d. a flood
b. a lightning strike
300
If you rub two balloons together and hang them on a string, they will repel. What charges cause them to push apart?
Like charges (+ & +) or (- & -)
300
Motion is a change in the _______________ of an object.
a. speed
b. direction
c. position
c. position
400
This type of magnet always has a magnetic force
Permanent magnet
400
Where are magnetic forces strongest on a bar magnet?
Near the poles of a magnet
400
Which change will decrease the electric force between two charged objects?
a. Add more electric charges to them.
b. Bring them close together.
c. Move them far apart.
d. Rub them together.
c. Move them far apart.
400
Which image best shows how the charges would cause a lightning strike?
Picture 1 (negative clouds, positive ground)
400
When kicking a soccer ball, it moves in this pattern of motion
A line
500
These three metals are considered to be truly magnetic, having a strong magnetic strength
iron, cobalt, and nickel
500
An electromagnet is a magnet that
a. has only one pole
b. can be turned on and off
c. produces electricity
b. can be turned on and off
500
This type of electricity is caused by an imbalance of positive and negative charges
Static electricity
500
Name the charges on the balloon and on the hair causing the hair to stick to the balloon
Unlike charges (+ & -)
500
Name the forces acting on this apple
Hand pushing up, gravity pulling down