North America has a diverse climate. In what ways do you think this can affect human settlement? In a positive way, a negative way or both? Explain.

Explain how a convection current in the earth is formed.

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.

Why is immigration so important today?