Meewhat is a hemisphere?
a) the line of longitude known as the prime meridian
b) one-fourth of the area on earth c) the line of latitude known as the equator
d) a half of the world, split by either the prime meridian or the equator

The answer is d. a half of the world, split by either the prime median or the equator nextreset

 A Hemisphere is half of a sphere or a half of the earth, usually as divided into northern and southern halves by the equator, or into western and eastern halves by an imaginary line passing through the poles or a half of the celestial sphere.  

which is know as the answer to be
 

D.a half of the world, split by either the prime meridian or the equator Next reset

Mantle convection is the process that drives plate tectonics. the theory of plate tectonics states that the crust is divided into plates that float on the semi molten mantle below. the circular motion of the magma as it slowly rises and falls or move though convection cells drags the plates along causing them to move. the heat source in the lamp would represent the earth's core. the core is the source of energy that drives convection in the mantle. the lava represents molten magma under the earth's surface. if the lava lamp had floating pieces they would move as the circular motion of the lava in the lamp as it rises and falls would move them along the surface. these floating pieces would represent pieces of the earth's crust. 

Ibelieve the answer is c also i'm in k12 too