Fact 1: Chemical weathering causes iron in rock to oxidize.

Fact 2: Iron oxides are produced that are red, orange, or brown in color.

Given the two facts above, answer the question "What does chemical weather cause iron to do?" with the following options: 
- Change to rainbow colors
 - flow of electrons
 - contamination
 - Stay the same
 - It gets heated up
 - Plant growth is reduced
 - Change gender
 - Change color to brown


 

        Change color to brown 