Where does a mantle plume first form? 1)The Crust
2)The plastic mantle
3)The inner core
4)The outer core

The two types of plains are coastal plains and lowland plains

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.

What is the amount of organic matter in all living organisms in a habitat called?