What are the Signs that a Chemical Reaction has Occurred?

Do you you know the sings of Chemical reactions?

The four main sings are:

• Change in Color

• Gas is produced

• Change in Temperature

• Change in State

—These changes are irreversible or permanent.

Some examples of chemical changes are:

• candle burning

• toasting a marshmallow

• cooking a cake

• metal rusting

• cooking an egg