Compared to the surrounding material, mantle plumes rise toward Earth’s surface from the core-mantle
boundary because they are
(1) cooler and less dense (3) hotter and less dense
(2) cooler and more dense (4) hotter and more dense
boundary because they are
(1) cooler and less dense (3) hotter and less dense
(2) cooler and more dense (4) hotter and more dense