You are presented with the question "What is happening inside a firecracker as it starts to go off?" and the following answer choices: 
- separation
 - explosion
 - adding heat
 - chemical reaction
 - It remains dormant
 - wavelengths and photons
 - uncontrolled
 - fusion

Now knowing that afirecracker converts chemical energy into sound and chemical energy Energy released as a result of chemical reactions, choose the best answer.


 

    chemical reaction     