This is a physical process.
This is a physical change. There is nothing that changes the components of either the diamond or the glass when the diamond is used to scratch glass.
Burning is always a chemical change. Melting is a physical change.
Both chemical -- carbon, and physical -- 10 on the Mohs Scale of hardness for minerals.
Chemical broooooooooooooooo niga
it is a chemical change
Chemical I think
physical as the chemical structure does not change.
A physical change
Physical - there are no chemicals involved
Chemical change
Itβs a physical change π
physical change