What are some common signs of a chemical change?

Question

like some examples would really help????

Answer 1

Some examples of chemical changes are: iron rusting, mixing materials that cause bad odors or pleasant smells, explosions of fireworks, milk souring, rotting bananas, and combustion like burning wood.  

Answer 2

Here are a few:

 

Change in color

Change in temperature without any change of the surrounding temperature

Combustion

Rapid release of a gas (e.g., bubbles) without any change of the surrounding temperature