1. What is a Primary Source ?* A .Only artifacts are primary sources
B . A source that comes from the time of the event being investigated
C .The main source used in an investigation
D . A source which is produced after the time of the event being investigated
F .Other

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth