Magnetic Force

A magnet is a material that has an area around it where ​ (a)   is active.
In this area a magnet can attract or ​ (b)   other ​ (c)   and it can attract a ​ (d)   material.

• magnetic force
• repel
• magnets
• magnetic

A magnetic material does ​ (a)   have an area around it where ​ (b)   is active.
So a magnetic material cannot ​ (c)   another magnetic material.

• not
• magnetic force
• attract

What happens when the unlike poles of two magnets face each other?

• a. They repel each other
  

• b. They break apart
  

• c. They attract each other

• d. They lose magnetic force

What does Arun’s experiment show about magnets?

• a. They only attract when touching
  

• b. Magnetic force can act over a distance

• c. They only work underwater
  

• d. Magnets must be connected by metal

What happens if the magnets are stronger?

• a. The magnetic field becomes weaker
  

• b. The magnetic field becomes smaller
  

• c. The magnetic force works over a shorter distance
  

• d. The magnetic field area and distance of attraction become bigger

Why can’t you use a steel ruler for this activity?

• a. Steel rulers are too sharp
  

• b. Steel rulers are too expensive
  

• c. Steel is magnetic and would interfere with the magnet

• d. Steel rulers are not long enough

Why did you use a steel paperclip?

• a. Because it is colorful
  

• b. Because it floats in water
  

• c. Because steel is magnetic and will be attracted to the magnet

• d. Because it's heavier than plastic

What does this activity help us learn about magnetic force?

• a. Magnets only work underwater
  

• b. Magnetic force only works at zero distance
  

• c. Magnetic force can act over a distance

• d. Magnets can push objects physically

Why is it important to take three readings and calculate the mean?

• a. To use more paper
  

• b. To make the activity longer
  

• c. To increase accuracy and reliability

• d. To confuse the students

What do you do with the three readings?

• a. Add them together and pick the largest
  

• b. Multiply and divide by 10
  

• c. Add them and divide by 3 to find the mean

• d. Choose the reading you like best