Constitution convention consists of the body of delegates which gathered together to write a new constitution or to ratify the present one. The Philadelphia Convention of 1787 which took place to solve the problem of weak federal government eventually turned towards an entirely new plan and therefore the Article of Confederation was replaced by new written Constitution.
A monotheistic religion worships only one god, a polytheistic religion worships many gods. Examples: Monotheistic: Islam, Judaism Polytheism: Hinduism, Buddhism