1. when writing, you can most effectively use a dash to

The earth's internal process which drives seafloor spreading is

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.

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?