Alfred Wegner proposed that the break-up of Pangaea began about years ago. A. 180 billion
B. 180 million
C. 4.5 million
D. 4.5 billion
E. 135 million

What can happen to solar radiation when it enters earths atmosphere? check all that apply 1)it is absorbed by earth. 2)it is reflected by clouds. 3)it is reflected by glacial ice. 4)it is condensed into visible light. 5) is amplified by water molecules.

Which of the following statements best explains why there tends to be a greater number of large cities in southern africa than the east africa

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.