Question 6 A student concludes that Earth's lithosphere is gradually shrinking as crust is destroyed at subduction zones. Do you agree with the conclusion? Why? A No. Earth's lithosphere is actually growing because much more crust is being created at subduction zones than destroyed. No. Earth's lithosphere is not shrinking because new crust is being created at mid-ocean ridges. No. Earth's lithosphere is not shrinking because crust is not actually destroyed at subduc- tion zones: it simply sinks into the mantle before resurfacing elsewhere. D Yes. The student is correct: Earth's lithosphere is shrinking.

Question 6 A student concludes that Earth's lithosphere is gradually shrinking as crust is destroyed at subduction zones. Do you agree with the conclusion? Why? A No. Earth's lithosphere is actually growing because much more crust is being created at subduction zones than destroyed. No. Earth's lithosphere is not shrinking because new crust is being created at mid-ocean ridges. No. Earth's lithosphere is not shrinking because crust is not actually destroyed at subduc- tion zones: it simply sinks into the mantle before resurfacing elsewhere. D Yes. The student is correct: Earth's lithosphere is shrinking.