Answer:
It's determined by the ability of one mineral to scratch another mineral.
A
Hope this helped thanks u
Sound energy is produced by vibrating objects.
Example: when you speak you vibrate the air molecules in the air. If you where to speak in space no “sound” would be produced since there is nothing for the vibration of your voice to travel through.
First read the introduction.
Seconds look at the pictures how to build it.
