What is another name for lines of latitude?

What is the imaginary line that is exactly halfway between the North Pole and South Pole?

What is the highest ridge running through the Rocky Mountains that separate streams flowing east or west?

What type of water transportation made the Mississippi River a major waterway for transporting goods?

What is the name of the "jigsaw puzzle" pieces that make up the earth's crust?

What is the process of injecting water into the ground under high pressure sometimes causes earthquakes?

What time is it in the Pacific Time Zone? (#1 on the map)

What time is it in the Mountain Time Zone? (#2 on the map)

What time is it in the Eastern Time Zone? (#3 on the map)

The Richter Scale measures the strength of a volcano.

The state of Louisiana has grown 15-50 miles in the last 5,000 years due to the movement of sediment.

The Prime Meridian marks the end of one day and the beginning of the next.

The continental United States includes 24 time zones.

The Grand Canyon was formed by weathering and erosion.

Which river runs through the Hoover Dam?

Which is the shortest river (200 feet) in the United States?

Which two rives were explored by Lewis and Clark?

Which river did the settlers of Jamestown, Virginia settle along?

Which is the longest river in the United States?

Which river carries the most water in the United States?

Which river was explored by Marquette and Joliet?

Which river is heavily used for kayaking, rafting, and other recreational activities in Georgia?