Question

what is plaster of paris

Answer 1

 a white powder that sets to a hard solid when mixed with water, used for making sculptures and casts, as anadditive for lime plasters, and for making casts for setting broken limbs. It is usually the hemihydrate of calciumsulphate, 2CaSO4.H2O

Answer 2

plaster of Paris is like powder and it helps to repair damages in teeth