The continuous movement of water from the oceans to the atmosphere, from the atmosphere to the land, and from the land back to the sea is known as

The continuous movement of water from the oceans to the atmosphere, from the atmosphere to the land, and from the land back to the sea is known as hydrologic cycle. 

A. it is created from magma. the agents of a metamorphic rock is heat and pressure. (heat from intrusion of magma or burial)

2pi more meters because you find the circumference which is 6pi and 4pi and subtract it and you get 2pi