chemical changes
physical change
Physical change occurs when a substance just changes state.
production of gas
Production of gas is when bubbles form and gas is made.
color change
Color change occurs when you get 2 substances together it forms a new substance and a color is diffrent.
solid precipitate
Solid precipitate is when a solid evaporates.
temperature change
temperature change
Temperature change will happen when you form a new substance and it changes temperature.