1. Mississippi
   Missouri
2. Rio Grande

The Rio Grande River separates the Texan and Mexican towns.

1. 50 million
   100 million
2. More than 500 million

The population of North America is expected to reach more than 533 million in 2016.

1. True
2. False

This is true. Canada spans more than 3,855,100 square miles (9,984,670 square kilometers).

1. The Sierra Nevadas
   The Rocky Mountains
2. The Cascade Range

The Great Divide runs north and south through the Rocky Mountains.

1. The Great Plains
   The Great Basin
2. The Atlantic Seaboard

The Great Plains features a broad expanse of prairie and steppe that lies east of the Rocky Mountains in both the United States and Canada.

1. Zero
   One
2. Two

Every country in North America borders an ocean. Canada, the United States, and Mexico border both the Atlantic and the Pacific.

1. Copper, lead and gold.
   Tungsten, zinc and uranium.
2. All of the above.

The Rocky Mountain region has been mined for its copper, lead, gold, silver, tungsten, uranium and zinc.

1. Alaskan Inside Passage
   Hoover Dam
2. Panama Canal

The 50-mile (80-kilometer) Panama Canal, which was completed in 1914, is one of the most important waterways in the world — by connecting the Atlantic and Pacific oceans through the Isthmus of Panama, it dramatically shortens shipping routes.

1. The Badlands
   Death Valley
2. Mojave Desert

Death Valley's Badwater Basin in Furnace Creek, California, has the lowest elevation in North America at 282 feet (86 meters) below sea level.

1. True
2. False

Canada, the United States and Mexico account for most of the North America land mass.

1. Cascade Range
   Rocky Mountains
2. Appalachian Mountains

The Rocky Mountains are the largest chain in North America, stretching from British Columbia, Canada, to New Mexico.

1. True
2. False

Greenland’s major physical feature is its massive ice sheet, which is second only to Antarctica’s in size. The Greenland ice sheet covers more than 700,000 square miles (1.8 million square km) — more than 80 percent of its total land area.

1. True
2. False

The Everglades cover more than 4,300 square miles (11,137 square kilometers) of southern Florida.

1. New York City
   Mexico City
2. Los Angeles

Mexico City is identified as the most populous city in North America, with a population of nearly 20 million.

1. Lake Superior
   Lake Huron
2. Lake Michigan

Lake Superior the largest freshwater lake in North America.

1. Sierra Nevada and Cascades
   Sierra Nevada and Alaska Range
2. Cascades and Canadian Shield

Both the Sierra Nevada and Cascades follow the Pacific Coast, shielding the humid winds that sweep in from the ocean.

1. True
2. False

It took more than 60 years from the time Maj. John Wesley Powell began to conduct geological studies of the Colorado River in 1869 until construction on the dam began in 1933. It only took five years to complete construction.

1. Denali
   Mount Logan
2. Iztaccihuatl

Denali, which is located within Denali National Park and Preserve in Alaska, stands at 20,320 feet (6,194 meters).

1. More than 200
   More than 2,500
2. More than 7,000

The Caribbean region includes more than 7,000 islands, islets, reefs and cays. Some have relatively flat and sandy terrain, while others are rugged, mountainous and volcanic.

1. Appalachian Mountains
   Rocky Mountains
2. Cascade Range

Some of Earth's youngest mountains are in the Cascade Range of the U.S. states of Washington, Oregon and California, where some peaks began to form only about 1 million years ago.

1. 15
   20
2. 25

The Great Lakes — Lake Superior, Lake Michigan, Lake Huron, Lake Erie and Lake Ontario — contain about 20 percent of the world's freshwater.

1. Five
   Six
2. Eight

North America is divided into five physical regions: the mountainous West, the Great Plains, the Canadian Shield, the varied eastern region and the Caribbean.

1. Mount St. Helens
   Mauna Loa
2. Kilauea

While Kilauea in Hawaii is considered one of (if not <i>the</i>) most dangerous volcanoes in the U.S., it's actually Mauna Loa that is the largest.

1. Mississippi
   Missouri
2. Rio Grande

The Missouri River is North America's longest river, beginning in western Montana and ending 2,341 miles (3,767 kilometers) away, north of St. Louis, Missouri, where it enters the Mississippi River.

1. True
2. False

The four major desert regions — Great Basin Desert, Sonoran Desert, Chihuahuan Desert and Mojave Desert — are all in the American Southwest and Northern Mexico.

1. 5
   18
2. 23

There are a total of 23 countries in North America, including all of the Caribbean and Central American countries, Bermuda, Canada, Mexico, the United States and Greenland.

1. True
2. False

British Columbia borders four states: Washington, Idaho, Montana and Alaska.

1. Three
   Four
2. Five

North America borders four major bodies of water: the Pacific Ocean, Atlantic Ocean, Arctic Ocean and Gulf of Mexico.

1. First
   Second
2. Third

North America is the third largest continent, after Asia and Africa.

1. Volcanoes and tornados.
   Every type of climate.
2. Mountains and islands.

Weather varies dramatically across the North American landscape. Climates range from arctic cold to equatorial heat and everything in between.