What the h does this even mean? someone please help for 20 points! 2. Calculate the approximate diameter of Earth. Use the lowest figure for the thickness of the crust. Show your work.

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.

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.