Science Buddies: "Ask an Expert"

I am doing a science fair project on how temperature affects magnetism. I have three questions: 1)Does the temperature of a magnet make its magnetic field smaller? 2)What are the effects of cryogenic temperatures on magnets? 3)Is there a temperature that is cold enough to make a magnet stick to another piece of magnetic material so the pieces are like one piece? May you also give a little information on why the questions are true or not? Thank you very much for answering these questions.

This site gives a some information about the relationship between magnetism and temperature:

http://www.newton.dep.anl.gov/askasci/p ... y00880.htm