A magnet was placed near a pile that contained both iron and sulfur. The magnet was moved gradually closer to the pile. As it neared the pile, the magnet started attracting small pieces of iron from the pile.
Which of these statements best describes the contents of the pile?
It is a heterogeneous mixture of iron and sulfur that can be separated by magnetism.
It is a solution of iron and sulfur that can be separated by magnetism.
It is a compound of iron and sulfur that can be separated by magnetism.
It is a suspension of sulfur in iron that can be separated by magnetism.