How are lines of longitude measure to the east of the prime meridian

What is associated with mid-ocean ridges?

Which of the following is typically not a characteristic of a foraging society? a. foraging societies are nomadic groups. b. foraging societies consist of small groups with ties based on kinship. c. individuals in foraging societies have few personal possessions. d. foraging societies have formal social and class structures

The covers all of earth like a thin shell,but it is not a solid sheet of material.it is broken up into several large sections and many smaller ones. fill in the blank.