Kepler discovered the forces that govern planetary motion.
a. true
b. false

The answer is definitely A. True. Johannes Kepler, was an astrologer, astronomer and a mathematician. He was a German scientist in the 17th century who is best credited for his Laws on Planetary Motion. Along with science, Kepler based his studies on his religious notions and beliefs that the God that created the world based it with intellectual reason and pure enlightenment. Kepler’s impact to the field of Astronomy is so huge that he inspired Isaac Newton’s Theory of Universal Gravitation. 

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.