Physical- that is water vapor freezing into ice. It can be reversed (warm up the window) Chemical changes don't reverse.
It is chemical. It is chemical because when salt is formed from elements it becomes a chemical and not a physical.
when wood rots and forms humus is a physical change
Chemical. It produces new forms of matter that were not there before.
Physical
Physical
Dissolving in water is a physical change.
Its is chemical as
Chemical
This is a chemical process: a hydration reaction occur.
physical because doesn't matter if it forms its still a cave
physical because doesn't matter if it forms its still a cave
It is a chemical property because water mixing with oxygen forms rust. Rust is a chemical property