Breaking water into the component parts of hydrogen and oxygen is a CHEMICAL change.
Breaking glass is a physical change, as it does not change the chemical composition of the material.
Since in breaking down there is no chemical change it's a physical change
This is a physical change.
physical change
physical change
Physical or chemical
Breaking up water into oxygen and hydrogen gas is a chemical change because the chemical composition of water (H2O) is altered to form new substances (O2 and H2). This process involves the breaking and formation of chemical bonds.
Physical
It is a chemical change.
Breaking, grinding, cracking are all examples of a physical change. The nature of the substance has not changed, just the size of the pieces has changed.
This is a chemical change.
Breaking a brick is a physical change because it does not alter the chemical composition of the brick. The bricks remain chemically the same even after breaking into smaller pieces.