What is the main difference between different types of map projections?

Scientist believe that earths core is around 6000°c where does this heat come from

Who owned most of the resources in a market or capitalistic economy? in a socialist or command economy? what determines ownership in a traditional economy. (economies)

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.