Column 1
Define permanent magnet
an object that is constantly magnetic and sticks to iron
Define magnetic field
a invisible field around a magnet
Define temporary magnet
a piece of iron that behaves like a magnet only when it is surrounded by a magnetic field
Define attract and repel
attract: to pull toward each other
repel: to push away from each other
What materials stick to magnets?
iron or steel
Pick which materials in this list stick to magnets:
1. sawdust
2. iron
3. copper
4. aluminum nail
5. paper clip
iron and paper clip
What happens when a piece of iron COMES CLOSE TO or TOUCHES a permanent magnet?
The piece of iron will move towards the permanent magnet if it comes close to it and eventually stick to it.
What was the most important part of the balance, steel washers, and spacers experiment to ensure the accuracy of your data?
Placing the steel washers into the cup CAREFULLY to not create extra force to alter the data
List 3 objects that DO stick to magnets and explain why.
black rock, paper fastener, steel nail, steel paper clip, steel screen, steel screw, steel washer
These objects stick to magnets because they all contain iron or steel
Based on what you tested, can a magnet attract a paper clip through materials? What kinds of materials?
Yes, a paper clip can be attracted through: cardboard, copper foil, aluminum foil, and sponge
What is the effect on the force of attraction between two magnets as the distance between them changes? (experiment with the balance, spacers, and steel washers)
The attraction between two magnets decreases when the distance between them increases
What makes magnets attract AND repel each other? Use poles in your explanation
When magnets attract, the north and south poles are able to stick together; opposite poles attract
When magnets repel, north and north poles repel, and south and south poles repel; like poles repel
List 3 objects that DO NOT stick to magnets and explain why
aluminum foil, aluminum nail, brass ring, cardboard, copper foil, plastic chip, plastic straw, river rock, rubber band, sponge, wood stick, wool yarn.
These objects did not stick because they do not contain any iron or steel
When you make a chain of iron objects, you start with a magnet, stick an iron object to the magnet, then stick other iron objects to more iron objects. Why do you think the iron objects stick to each other even when they are not touching the magnet?
The magnet induced magnetism into the first piece of iron it touches, therefore making the piece of iron a temporary magnet and able to pick up other iron objects. The pattern then continues with another iron object trying to stick to the first iron object. That second iron object will stick because the magnet created a temporary magnet with the first iron object.
If you put something like a piece of cardboard between a magnet and an iron nail, the magnet still holds the nail in place. How can that happen? What will happen if you continue to add pieces of cardboard in between?
The piece of cardboard is thin enough for the magnetic field to still be able to interact with the iron nail. If you add more pieces of cardboard, the magnetic field will slowly become weaker, therefore the magnet won't be able to hold to iron nail anymore.
In the experiment where you taped a piece of string to the floor and created a "floating paper clip", explain why the paper clip floated in the air AND why it later fell to the ground. *Use vocabulary*
Magnetism works through the air, so the magnet and the paper clip do not need to be touching for the paper clip to be magnetized. The magnetic force between the magnet and the paper clip is stronger than the force of gravity pulling the paper clip down. When the magnet is removed, gravity takes over
Did the "black rock" stick to the magnet? Why or why not?
Yes, the black rock did stick to the magnet. The rock contains a mineral called magnetite, which is extremely rich in iron
What is the student testing? Choose the best answer. (Refer to the chart on the board)
1. How many paper clips can you pick up with a magnet?
2. How many trials are needed to pick up the most paper clips?
3. How does the strength of magnetism change as the number of magnets increases?
4. How can you find the average number of paper clips picked up by a magnet?
3. How does the strength of magnetism change as the number of magnets increases?
What conclusion can be drawn from the data table? Choose the best answer. (Refer to the data table on the board)
1. The average number of paper clips one magnet can pick up is nine.
2. The more magnets you use, the fewer paper clips you can pick up.
3. You can’t come to a conclusion; something is wrong because the student should have gotten the same number of paper clips for each trial
4. The more magnets you use, the stronger the force of magnetism
4. The more magnets you use, the stronger the force of magnetism
Use the data in the table to make a prediction. How many paper clips will five magnets pick up if the pattern continues? Choose the best answer. (Refer to the data table on the board)
1. 31
2. 20
3. 16
4. 18
2. 20