Marvelous Magnets
Name something in our classroom that IS magnetic.
Name something in our classroom that is NOT magnetic.
Answers vary
Name the 3 materials needed to create an electromagnet.
Battery
Wire
Iron Core
Helena kicks the ball with her foot.
Scott jumps over the ball without touching it.
Which student exerted a force on the ball?
Helena
A magnet has a north ______ and a south ______.
Pole
True or False:
All metals are magnetic.
False
What is an electromagnet?
A magnet that you can turn on or off with electricity
What kind of force causes an object to move?
Balanced Force or Unbalanced Force
Unbalanced Force
When you rub a balloon on a classmate's head, their hair starts to stand up and stick to the balloon. Why?
Static Electricity
What does the word magnetic mean?
Bonus 100 points: How can you tell if something is magnetic?
Anything that sticks to a magnet is magnetic.
Try to stick a magnet to it!
True or False
An electromagnet is a kind of temporary magnet
True!
It is only a magnet when electricity is running through it.
Did the ping pong ball or golf ball travel further when flicked?
Explain why.
The ping pong ball rolled further.
Heavier objects take more force to move.
What is a magnetic field?
The area around a magnet that has magnetic force.
Sarah says she can turn a regular paper clip into a magnet.
Is she correct? Explain how she could do it.
What are two ways to make an electromagnet stronger?
Add more wire around the iron core
Use more batteries or a bigger battery
What will hit the ground first?
A golf ball, or a ping pong ball? Explain why.
Bonus 100 points: How would it be different if we dropped a golf ball and a piece of paper?
Golf ball and ping pong ball will hit at the same time because gravity causes all objects to fall at the same speed.
Golf ball would hit before the piece of paper because of air resistance.
Name an example of a balanced force.
Name an example of an unbalanced force.
Answers vary
1. In class, our magnets could move paper clips even through a folder. Why?
2. Why can't a magnet move a paperclip from across the room?
1. The magnetic field is large enough to go through the folder and move the paper clip.
2. Because the magnetic field is not large enough.
Describe how to create an electromagnet
2. Attach the ends of the copper wire to each end of the battery
A team of 5th graders defeats a team of 2nd graders in tug of war.
Was this a balanced or unbalanced force? Explain how you know.
Unbalanced
The rope moved when the 5th graders pulled it
Will the following pairs attract or repel?
North - North
South - North
Positive - Negative
Negative - Negative
Repel
Attract
Attract
Repel