The diagram shows a chemistry demonstration.
Sulfur
Iron
filings
Heat
Iron sulfide
Step 1: Iron and sulfur are mixed together in a test tube.
Step 2. The test tube is heated
Step 3. The test tube is allowed to cool
Which statement best describes this demonstration?
☐ A. Step one contains a compound, which is chemically combined in step two, forming a mixture in step three
8. Step one contains a compound, which is physically combined in step two, forming a mixture in step three.
C. Step one contains a mixture of elements, which are physically combined in step two, forming a new compound in step three,
D. Step one contains a mixture of elements, which are chemically combined in step two, forming a new compound in step three.