Geography and cities

How did the Delaware River support Philadelphia’s growth?

• The Appalachian system lies entirely outside Pennsylvania.
• The Delaware River helped support Philadelphia’s growth as a port and commercial center.
• Elevation has no meaningful connection to Pennsylvania climate patterns.
• Lake Erie has no effect on northwestern Pennsylvania’s weather.

How should Pittsburgh be understood?

• All Pennsylvania rivers drain through the same watershed.
• Elevation has no meaningful connection to Pennsylvania climate patterns.
• Pennsylvania has uniform physical geography with little regional variation.
• The river confluence at Pittsburgh helped support transportation and industrial growth in western Pennsylvania.