10 points for each answer Ethan began making a model to show the processes which resulted in the formation of oceans.

Which of the following would be the next step in the process?
A. The crust is broken down
B. Earths crust moves
C. Earths plates meet
D. Seafloor spreading

then that particular organisms become extinct.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

copper and glass have high electrical conductivity