Measurement and Data
A Global Network
Secular Variation and Earth's Core
Crust, Ocean, and Mantle
Quiet Time Variation and the Ionosphere
Magnetic Storms and the Magnetosphere
i gave you six because im not sure im right but i hope it helps im sorry if they are wong tho :/
Answer:
Mountains isolated many groups that migrated to the region. Dense forest served as a barrier to migration across the region. Vast plains facilitated the migration of people across the region.
Explanation:
CORRECT
Answer:
Core samples and Tree rings
Explanation:
Very early societies did not have a written language or ways to efficienly preserve information over time
The acute angle between the cord line of the wing and the direction of the relative wind is the angle of attack
