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 :/
The amount of trees in a given location?
Answer: Everytime a chocolate bar is purchased a cocoa farmer with get 6% of the profit made with his cocoa beans.
Explanation:
Nordic countries and United Kingdom
It is relatively stable hopefully this is the answer