water wind (natural diasters) and ice cracking
Voice Cracking in Males during puberty is the growth of fat tissues around the vocal chords.
Cracking your knuckles releases a gas that naturally forms in your joints. Cracking them isn't bad for you unless it causes pain.
Air bubbles, same as in cracking knuckles...
the heat of the sun and the dryness of the soil
No. The cracking sound is caused when the small bubbles of air in between your joints pop. It does not cause any problems. People who say that is causes damage are passing on a myth.
No, a chisel is a cutting tool.
Carve
It is a common myth that cracking your knuckles causes arthritis, but it is not true. It is, however, annoying!!
No, a chisel is a cutting tool.
The chisel is stuck! A sharp chisel is easy to use.
A wood chisel is a carpentry tool.