chemical
physical
chemical
No it is not. The chemical composition is H2O before and after freezing.
An 'iceberg' is no kind of change, but the melting and forming is a physical change.
Forming a bar of gold into wire is considered a physical change. This is because the gold's chemical composition remains the same during the process, only its physical shape is altered.
Melting iron is a physical change because it does not alter the chemical composition of the iron. It is a change in state from solid to liquid without forming a new substance.
I think it is a chemical change Forming underground it is a chemical change Salt forming from a saline solution for example h20 + NaCl --delta-> h2 + O2 + NaCl (This is not a balanced solution) This is a physical change, since there is no change to the Sodium Chloride
No, it is a physical change, like boiling, melting and freezing
The process of juice freezing and forming popsicles is a physical change. This is because the change in state from liquid to solid is a physical change that can be easily reversed by allowing the popsicle to thaw back into liquid form.
Still a physical change because its still gold and weren't doing anything like making a new element or mixing chemicals with the gold. So its still a physical change.
It is a physical change: water changes from gas to solid.
The tooth is rotting so it is changing its nature due to the influence of bacteria or the acid secreted by bacteria. If the new material is no longer dentine but the byproducts of decay then it is a chemical change.If the tooth breaks then that is a physical change.