What causes convection currents to occur on earth?.

What factors led to europe's global dominance in economic and political factors? what impacts did that dominance have on other peoples and environments?

In north america, most winter storms form when cold, dry air from interacts with warm, moist air from

Will someone earth science water cycle: will someone tell me how the water cycle works, but in a story? ? pretend you are a drop of water somewhere. (like; "once i was floating around in a cloud" or, "once i was lying in a puddle in the middle of a parking lot.) and tell your life story! and use the words "evaporation" "condensation" "accumulation" "transpiration" "precipitation" and "runoff" tell the story like your the drop of water telling your life story. include all the parts of the water cycle including those vocabulary words above. and !