This crust is the most dense
this crust is made of igneous
rocks from volcanoes
1. oceanic crust
this crust is younger
2. continental crust
this crust is made of
metamorphic rocks from
deep within the earth
this crust is thinner

What happens as electrons move along the chain of molecules known as the electron transport chain? they gain energy, which causes atp molecules to lose phosphate groups. they gain energy, which causes h *ions to join with oxygen to produce water. they lose energy, which is then used by the cell to make atp. they lose energy, which is then used to break down atp.