It's used as a warning - to let animals (and people) know they're venomous.
There is no powder on a rattlesnake's rattle so the answer is no.
They rattle
The Arizona black rattlesnake is black and has a rattle.
it shakes its tail
Some other snakes that rattle their tails to warn off potential predators include the Massasauga rattlesnake, the Western diamondback rattlesnake, and the Timber rattlesnake. These snakes use their tail rattle as a form of defense when feeling threatened.
Rattle and fangs
yes
A rattle snake has no protection from a human,but it might would use his fangs
Rattlesnakes are best known for, and most easily recognized by, their rattle. They use it to scare offpredators.
No. The rattle is made up of skin. Each time the snake sheds, another rattle gets added to it.
No, the "rattle" does not have any thorns on it.
There is nothing inside the rattle, it is hollow.