Question

what is called the upper chamber

Answer 1

An upper house is one of twochambers of a bicameral legislature (or one of three chambers of a tricameral legislature), the otherchamber being the lower house. ... A legislature composed of only onehouse (and which therefore has neither an upper house nor a lower house) is described as unicameral.

Answer 2

Upper chamber of volcano is the top part of the volcano which is also known as the opening of the earth's crust . Because of the shaking of the earth the lava which is known as magma comes out from the upper chamber of volcano .It is known as upper chamber of volcano