1. Why would it be important to test the phenomenon with different strengths of a magnetic field?

• Using different strengths of a magnetic field allows us to change the magnetic orientation of the objects.
• If we’re able to test that there is a magnetic field involved, then we can say the phenomenon is not due to an electrical field.
• If there isn’t a magnetic field involved, then we can conclude that it’s an electrical field interaction.
• If the phenomenon is due to a magnetic field, there should be a change in the way the two objects interact.

2. If a magnet is used to pick up paperclips, it can be assumed that the paperclips are made of a material that magnetic fields and is considered a(n) material.

3. A magnet is held about an inch over a paperclip and the paperclip moves slightly toward the magnet. This is evidence that magnetic forces can act .

4. Changing the orientation of a magnet can change the it has on/with an object.

5. What's happening here that we might be able to investigate?

6. Which of the following describes a similarity between Gravitational and magnetic forces?

• They are both only attractive forces
• They both can be attractive and repulsive
• They can both be attractive forces
• They can both be repulsive forces

7. What are the objects interacting and exerting forces on each other to cause the observations in the gif?

• The metal object and the pipe
• The metal object and gravity
• The metal pipe and the person’s hand
• The metal object and the person’s hand

8. What type of interaction can be investigated based on the gif and materials in figure A?

• Electric attractions between objects with known charges
• Electromagnetic forces that occur between objects that are in contact with each other.
• Gravitational forces between the pipe and the metal
• Magnetic and electric fields that are created from moving magnets.

9. Refer to figure A. If a student wanted to investigate how the strength of the magnetic field affects this phenomenon. How could they use the materials provided to change the strength of the magnetic field?

• Use a longer pipe
• Add washers to a magnet
• Use a thicker pipe
• Put multiple magnets together

10. Which of the following is NOT a question that could be investigated using the materials in figure A?

• How does the length of the pipe affect the strength of the magnet?
• Does the distance between the object and the pipe walls affect the rate it falls?
• How does the type of pipe affect the motion of the falling object?
• How do different objects fall through a copper pipe?

11. Which of the following would be the best independent variable for an investigation to answer the question, “How does the distance between the pipe and object affect the rate it falls?”

• The number of magnets used
• The diameter of pipes used
• The length of the pipes used
• The time it takes the object to fall

12. Your friend predicts that any object will fall quickly in the plastic pipe and conducts an investigation to gather evidence. Which of the following is a variable they will need to keep constant in their investigation?

• The mass of each object that is dropped
• The time it takes each object to fall
• The length of the pipe used
• The type of object being dropped in the pipe

13. Chad notices that the metal and plastic washers fall quickly through the pipe, but magnets fall slowly. What can he infer from this observation?

• The rate the object falls is related to the presence of a magnetic field.
• The rate the object falls is related to the type of metal pipe that it travels through.
• The rate the object falls is related to the type of metal the objects are made of.
• The rate the object falls is related to the distance away the object is from the pipe.

14. A student is conducting an investigation to determine if the field being generated in the gif is a magnetic field. Which of the following sets of trials would provide the best evidence for this?

• Trial 1: magnet dropped down aluminum pipe, Trial 2: iron washer dropped down aluminum pipe, Trial 3: plastic washer dropped down aluminum pipe.
• Trial 1: iron washer dropped down iron pipe, Trial 2: iron washer dropped down aluminum pipe, Trial 3: iron washer dropped down plastic pipe.
• Trial 1: plastic washer dropped down plastic pipe, Trial 2: iron washer dropped down aluminum pipe, Trial 3: iron washer dropped down iron pipe.
• Trial 1: magnet dropped down 1in copper pipe, Trial 2: magnet dropped down 2in copper pipe, Trial 3: magnet dropped 3 in copper pipe.

15. Which of the following observations would serve as evidence that forces are exerted between objects that are not in contact?

• A magnet dropped in an iron pipe gets stuck to the inside of the pipe and doesn’t fall out of the bottom.
• All the objects fall straight down through a plastic pipe without touching the inside of the pipe.
• A magnet falls slower than other objects through metal pipes without touching the inside of the pipe.
• All of the objects fall straight down through metal pipes without touching the inside of the pipe.

16. One of your classmates makes the hypothesis that in pipes made of magnetic metals, a magnet will fall slower than other objects. Which of the following investigations should they conduct to test this?

• Drop a magnet and different objects down a magnetic pipe and see how the motion of the objects are affected.
• Drop a magnet down the inside of a metal pipe that is magnetic (iron) and then drop it again on the outside of the pipe and see how the motion of the magnet is affected.
• Lay a metal pipe that is magnetic (iron) and a metal pipe that isn’t (aluminum or copper) on their side and roll a magnet through them to see how the motion of the magnet is affected.
• Drop a magnet down a metal pipe that is magnetic (iron) and one that isn’t (aluminum or copper) and see how the motion of the magnet is affected.

17. A group of students wants to investigate how the strength of a magnetic field affects the speed of the dropped object, using materials from figure A. They conduct an experiment using the iron pipes because they know iron is a metal that interacts with magnets. They put each of the different types of washers down the iron pipe and time how long it takes each washer to reach the bottom.

Will this experiment provide evidence for their initial question? If so, explain why. If not, what revisions could be made to improve the evidence collected?

18. Describe how you could use the materials in figure A to conduct an investigation that provides evidence that objects can interact through fields without touching.

19. If you learn that the object that is being dropped through the pipe is a magnet, how could you test the changes in this phenomenon with different strengths of a magnetic field?

20. Is there any evidence that there are forces being exerted here when the objects are not in contact? If so, explain what do you observe. If not, what makes you think so?