The picture below shows a chemistry experiment. Which statement best describes steps of this experiment?
* 1 point
Iron
Sulfur
filings
Heat
Step 1: Iron and sulfur are mixed together in a test tube.
Step 2: The test tube is heated.
Iron sulfide
Step 3: The test tube is allowed to cool.
Step one contains a compound, which is chemically combined in step two, forming a mixture in step three.
Step one contains a compound, which is physically combined in step two, forming a mixture in step three.
Step one contains one element, which is physically changed in step two, forming a new compound in step three.
Step one contains a mixture of elements, which are chemically combined in step two, forming a new compound in step three.