Clasificación de las ciudades por habitantes.

Select the correct answer from each drop down menu. among these figures figure and blank have the same volume. 1 a c e 2 b d

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.

What happens to rock when acid reacts with it?