This mountain range is the oldest in North America.
What are the Appalachian Mountains?
This term describes large bodies of freshwater surrounded by land, such as Lake Superior.
What are the Great Lakes?
This climate type is characterized by long, cold winters and short, mild summers.
What is the subarctic climate?
This term describes the movement of people from rural areas to cities.
What is urbanization?
The U.S. economy is primarily based on this type of economic system.
What is a free market economy?
This river is the longest in North America, flowing from Minnesota to the Gulf of Mexico.
What is the Mississippi River?
This river system is crucial for transportation and irrigation in the Midwest.
What is the Mississippi River system?
This region of the U.S. is known for its humid subtropical climate, leading to severe thunderstorms and hurricanes.
What is the Southeast?
The largest city in the U.S., known for its cultural diversity and significant economic influence, is this.
What is New York City?
This sector has seen significant growth in recent decades, surpassing manufacturing in job creation.
What is the service sector?
This geographical feature separates the waters flowing into the Pacific Ocean from those flowing into the Atlantic Ocean.
What is the Continental Divide?
This type of pollution occurs when harmful substances enter water bodies, often from industrial sources.
What is water pollution?
This phenomenon can lead to drought conditions in the western United States.
What is climate change?
This network helped many enslaved African Americans escape to freedom in the North before the Civil War.
What is the Underground Railroad?
The Midwest became a center of industry largely due to this natural resource.
What is coal?
This plateau was formed by volcanic activity and is located in the Pacific Northwest.
What is the Columbia Plateau?
This practice involves managing and conserving water resources, especially in drought-prone areas.
What is water management?
This type of biome is characterized by vast grasslands and is mostly found in the Midwest.
What is the prairie biome?
In 2014, approximately this percentage of the U.S. population was foreign born.
What is 13.3 percent?
This practice involves relocating production to countries with lower labor costs.
What is offshoring?
The highest point in the United States is found in this mountain range.
What is the Alaska Range
This large-scale project in California was designed to supply water to millions of residents and farmland.
What is the California State Water Project?
This term refers to the gradual increase in Earth’s temperatures due to greenhouse gas emissions.
What is global warming?
This major event on September 11, 2001, led to heightened security measures and concerns about terrorism.
What are the terrorist attacks?
This economic downturn in 2008 was largely caused by risky mortgage lending practices.
What is the subprime mortgage crisis?