Megan left her bicycle outside on the patio while she went on vacation for several weeks. when she returned, megan discovered a reddish substance, rust, on the handlebars of her bicycle. the rust is an example of a(n)

Ithink the answer is a or d.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Where are the following questions