You are presented with the question "a firecracker converts chemical energy into what?" and the following answer choices: 
- kinetic energy
 - electromagnetic energy
 - An object is seen
 - vibrations in matter
 - objects that have mass
 - harmful substances
 - The bending of a ray of light
 - Loud noises

Now knowing that afirecracker converts chemical energy into sound and sound waves are vibrations in matter, choose the best answer.


 

    vibrations in matter     