Question

Which process is an example of a chemical change?

A metal railing rusting in damp weather

alcohol evaporating from a cotton swab

steam rising from a boiling pot of soup

a piece of wood shrinking as it dries out

Answer 1

A chemical change produces a new substance, while physical changes don't. In the case of the alcohol evaporating, it's still alcohol in the end, but it's now a gas. With the steam rising, it's it's still water. The wood loses some water but it's still wood, so the only possible answer would be the rusting on the railing because rust is a different type of material than the object that went under the transformation.

Answer 2

thank you

Answer 3

Thank you Ann

Answer 4

wood as it dries out