What is meant by the statement that desert ecosystems are controlled by abiotic forces, and why is it the case that they are abiotically controlled? (word limit 150)

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

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.

Mosses, lichens and shrubs can be found where in russia? a.grasslands b.mountain regions c.coastal plains d.siberian tundra