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Big Question

Big Question. Does magnetism work better in cold air compared to warm air ?

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Big Question

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  1. Big Question • Does magnetism work better in cold air compared to warm air? • The high temperature that destroys a magnet and its strength is called the Curie temperature. The Curie temperature is 1414 degrees F for iron. It is possible that if the temperature is warm, even not as high as the Curie temperature (1414 degrees F), then the magnet will not work as well. It may even work better in cold air than it would in warm air. • It may be that the colder the air is, then the stronger the magnet attraction will be.

  2. Hypothesis • If magnetism happens in cold air, then the strength of the magnetism is stronger than it is in warm air. • A really high temperature destroys a magnet. It is possible that if the temperature is warm, even not as high as the Curie temperature (1414 degrees F), then the magnet will not work as well. It may even work better in cold air than it would in warm air. • It may be that the colder the air is, then the stronger the magnet attraction will be.

  3. Interesting Facts A magnet is a thing or object that makes a magnetic field. A magnetic field depends on the direction and strength of the magnet. A magnet pushes away or brings together other magnets. Magnetism is talked about in physics. Physics is a science that describes how the world operates. Magnetism describes how materials respond to a magnetism field. Magnets can be made of iron, like a refrigerator magnet. Magnets are used in ATM cards and VHS tapes. The magnetism state of a material depends on temperature. If you heat a magnet too high, it will not work. The high temperature that destroys a magnet and its strength is called the Curie temperature. The Curie temperature is 1414 degrees F for iron

  4. Experiment • Materials: • Two 24 cm identical round glass pie dishes. • Refrigerator. • 2 ceramic block magnets from Lowes Home Improvement Store (2.2 mm X 4.8 cm X 9.5 mm). • Ruler.

  5. Instructions • Control Variable • 1. Place one pie dish on the floor, upside down. It should be normal room temperature. • 2. Place the ruler on the pie dish. • 3. Place one magnet one side of the pie dish, against the ruler. Place it at the starting point, line (0) on the ruler. • 4. Place the other magnet on the other side of the pie dish so that they do not come together. Place it against the ruler. • 5. Move the magnet that is farthest away from the starting point and move it really slowly toward the other magnet. • 6. When the other magnet comes to the magnet you are holding, stop. • 7. Measure the distance between the two magnets. • Experimental Variable: • Place one pie dish in the refrigerator for 20 minutes. • Repeat steps 2-7 from above.

  6. Variables Control Variable: The magnet attraction in warm air (room temperature). Experimental Variable: The cold dish is the experimental variable. It is expected to be different so the magnetic attraction (the distance) is guessed to be stronger on the cold dish than the warm dish (control).

  7. Observations The magnets worked the same way on the dishes. The magnets worked on the warm dish. The magnets worked on the cold dish too. I could feel the magnet push in my hands as soon as the magnet got close to the other magnet. The magnets moved away from each other very quickly when close together.

  8. Data • Control variable: Distance it took for the magnet on the warm dish (in normal air) to move. The magnet moved when it was 2 inches from the other magnet on the warm dish. • Experimental variable: Distance it took for the magnet to move on the cold dish. The magnet moved when it was 2 inches from the other magnet on the cold dish. • The difference between the magnet on the warm dish and the magnet on the cold dish was zero. The magnets both moved the exact same distance.

  9. Analysis of Data • The experiment tested the hypothesis. I thought that the magnet would work better in cold air, but the magnets worked equally strong in cold and warm air. • I know because I made one dish cold and one warm, and I carefully measured the distance that the magnets traveled on both dishes.

  10. Conclusion • My hypothesis was not correct because I guessed that the colder dish would make the magnet go further (work better) than the warm dish. It turned out that they both measured the same distance. • I would change the experiment by heating the warm dish in the oven. I would do that because it might actually change the way the magnet worked, and the hotter dish might make the magnet work worse than the room-temperature dish. • A new question I have is what if the cold dish was colder than the way I made it? For example, if the dish was made to be -10 degrees F. Or does magnetism work in an ice cube? If the temperature was really warm would that affect the differences in the magnet strength?

  11. References • First Science Encyclopedia. Senior Editors, Carrie Love, Caroline Stamps, Ben Morgan. Dorling Kindersley Limited. 2008. • Magnets. Terry Jennings. Black Rabbit Books. 2009. • Magnets. Angela Royston. 2001,2008. Heinemann Library a division of Pearson Inc. Chicago, Illinois. • Magnets. Kris Hirschmann. 2006. Thomson Gale, a part of the Thomson Corporation. • Wikipedia. Magnets.

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