Are cotton balls a better insulator than paper. I say cotton balls but the teacher wants me to write a hypothese which I did and explain how I would test it. I know cotton is a better insulator because it is used in materials can you give me a test or explain a test for this?

Insulation is measured in terms of resistance.
See:
http://en.wikipedia.org/wiki/Electrical_resistance

Both paper and cotton would be cellulose fibers. As such there should not be much differece (assuming the cotton balls were equally compressed.) If left fluffy, they woud be better.

Yes thank you but how would I test this because I have to say that. If I leave them in the heat they should stay the same temp and if I leave them in the cold they should not get cold???

I suggest you get two large shoe boxes or something similar that are the same size. Then, get two identical plastic containers that will easily fit in the shoe boxes with a lot of room for the insulating material. Fill each plastic container with ice cubes. Put each container in a box. Pack cotton balls around one container of ice cubes and paper around the other container. Check every few hours (or overnight) to see which container of ice took longer to melt.

To test whether cotton balls are a better insulator than paper, you can conduct an experiment using the following steps:

1. Gather the materials: Two large shoe boxes or containers of the same size, two identical plastic containers, cotton balls, and paper.

2. Fill both plastic containers with an equal amount of ice cubes.

3. Place one plastic container with ice cubes inside one shoe box and surround it with cotton balls.

4. Place the other plastic container with ice cubes inside the other shoe box and surround it with paper.

5. Close both shoe boxes and ensure they are sealed to minimize heat transfer from the surroundings.

6. Leave both shoe boxes undisturbed for a certain period of time. It is recommended to check every few hours, or you can leave them overnight.

7. After the designated time, open both shoe boxes and inspect the ice cubes in each container.

8. Compare the melting rate of the ice cubes surrounded by cotton balls and the ones surrounded by paper.

The result of this experiment will provide evidence of which material, cotton balls or paper, is a better insulator. If the ice cubes surrounded by cotton balls melted at a slower rate compared to the ones surrounded by paper, it suggests that cotton balls are better at insulating and retaining cold temperatures.

Remember to record your observations and data throughout the experiment and analyze the results to draw your conclusion. This way, you can provide objective evidence to support your hypothesis.