1. Name some of the counties that lie along the northern boundary of
Pennsylvania? 2. The eastern? 3. The western? 4. The southern? 5. In
the interior?
6. Through what counties does the Monongahela river flow? 7. The
Alleghany river? 8. What county borders on Lake Erie?
9. What range of mountains runs through the State? 10. What other
mountains are in the State?