Which of the Earths spheres contain the most Oxygen percent by volume?

Which of the following east asian contries are a peninsula? a. china b. taiwan c. south korea d. mongolia

Many areas surrounding the caspian sea contain important a. rare minerals b. forestry resources c. gold and silver mines d. oil and natural gas fields

Plz hury on a timer which statements explain what happens at deep-ocean trenches? check all that apply. crust is formed. mountains are formed. seafloor spreading occurs. crust becomes molten rock. denser plates slide under lighter plates.