42. what do we observe that indicates most objects in the universe are moving away from each other? a) blue shift of stars and galaxies b) red shift of stars and galaxies c) the universe and galaxies are all rotating d) galaxies are many light years apart the further they are from the sun.

A and can you help me with my geography homework please it is-
Question - To what extent can ecotourism be used as a strategy for sustainable development in Costa Rica. (9 Marks)

False there's only 832

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.