Which of these is an example of a physical change?
Asugar dissolving in warm water
Biron rusting in the presence of moist air
Cwood burning in the presence of oxygen
Dbaking soda reacting with acid to form a gas
Asugar dissolving in warm water
Biron rusting in the presence of moist air
Cwood burning in the presence of oxygen
Dbaking soda reacting with acid to form a gas