Which of the following is NOT one of the four main layers of earth's atmosphere? A troposphere
B thermosphere
C mesosphere
D exosphere

What body of water is the second cataract of the nile river submerged under

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.

In what three areas is the us leader?