Earth's mantle is exposed on the ocean floor in great slabs of ...

[Mr3Hunna]

Earth's mantle is exposed on the ocean floor in great slabs of rock between widely-spaced volcanoes in ________.
 
  A) deep-ocean trenches
  B) oceanic ridges
  C) oceanic rises
  D) ultra-slow spreading centers
  E) volcanic arcs

Question 2

Isostatic adjustments are the result of the buoyancy of Earth's lithosphere as it floats on the ________ below which is denser and plastic like.
 
  A) asthenosphere
  B) mesosphere
  C) outer core
  D) inner core

[dlook33]

Answer to Question 1

D

Answer to Question 2

A

[Mr3Hunna]

Thanks for the timely response, appreciate it

[dyrone]

Excellent