Chemical change
Bubbles
Color change
Odor change
Energy change
When there is a change in the smell.
When you leave and apple exposed in the air, it will get rotten and the smell will change.
When there is a change in the color.
In fall, leaves turn yellow/orange.
When temperature change.
In fireworks, the temperature increases.
When chemical bubbles.
When you mix different chemicals, they form a new substance, sometimes they will have bubbles.
Sarah BinSaeed
7/C
Sara Hisham