Clues to what ancient climates were like come from all of the following except
a. ice cores.
b. thickness of rock layers.
c. fossil tree rings.
d. plant pollens.

The primary agent of contact metamorphism is

Exactly what kind of weather conditions would a cold front produce?

This map shows the member states of the european union (eu). based on this map, what is the most likely reason the eu was formed? a) to increase trade between european nations b) to protect themselves from foreign enemies c) to begin the process of forming one large nation d) to isolate europe from the rest of the international community j