Alfred wegners theroy about the earths past included a supercontenent made up of allthe contienets put together what was the name of the super contenent

Matched chromosomes carrying information about the same characteristics in the organism are called

Are the layers of rock above and below the coal older or younger?

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere