What is sedimentary rock?  (1 point)

Responses

a type of rock formed over long periods of time by the cooling and solidification or molten Earth material 
a type of rock formed over long periods of time by the cooling and solidification or molten Earth material 

a type of rock formed in a very short period of time by sudden violent volcanic eruptions into the ocean
a type of rock formed in a very short period of time by sudden violent volcanic eruptions into the ocean

a type of rock formed over long periods of time by the transformation of existing rock types 
a type of rock formed over long periods of time by the transformation of existing rock types 

a type of rock formed over long periods of time by layers of silt building up on the floor of a body of water 

a type of rock formed over long periods of time by layers of silt building up on the floor of a body of water