1. What is the largest volcano on Earth?

Mauna Loa volcano in Hawaii Volcanoes National Park is the largest volcano on Earth, both in terms of volume and height above its base. Mauna Loa consists of about 19,000 cubic miles of lava and rises more than 50,000 feet above its base. Because of its massive size, the volcano has depressed the ocean floor about 5 miles.

2. What is the highest point above sea level in the United States?

Mt. McKinley in Alaska's Denali National Park at 20,320 feet above sea level.

3. Where is the lowest point in the United States?

Bad Water in Death Valley National Park, California, at 282 feet below sea level.

4. How deep is the Grand Canyon ?

In some places the Grand Canyon is more than 6,000 feet deep.

5. What is the origin of Crater Lake, Oregon?

Crater Lake National Park is of volcanic origin. It lies within the caldera of Mt. Mazama, a volcano of the Cascade Range that erupted 7,700 years ago. The mountain collapsed during its enormous eruption, forming a caldera.

6. What is the deepest lake in the United States?

Crater Lake, Oregon. Its deep blue waters extend to 1,932 feet below the surface.

7. What is the highest waterfall in the United States?

The highest waterfall in the United States is Yosemite Falls, in Yosemite National Park California, at 2,425 feet.

8. What is the largest reservoir in the United States?

Lake Mead, located on the Arizona-Nevada border, is the largest United States reservoir with a volume of 29,000,000 acre feet. However, Lake Powell, located in the state of Utah, is the longest reservoir with a length of 186 miles.

9. Which of the following sources stores the greatest volume of fresh water worldwide: lakes, streams or ground water?

Groundwater comprises a 30 times greater volume than the 30,000 cubic miles of water contained in all freshwater lakes, and more than 3,000 times the 300 cubic miles of water in the world's streams at any given time. Groundwater issues are important to virtually all National Park Areas and are especially important in Cave and Karst parks.

10. How was Half Dome in California's Yosemite National Park formed, and of what rock type is it composed?

Half Dome is a 2,200 foot-high granite monolith. The sheer rock face of Half Dome is the result of glacial erosion in the Yosemite Valley approximately 250,000 years ago.

11. What is acid rain?

Acid rain is one of the most damaging forms of pollution. It contains sulfuric acid, formed from sulfur dioxide and hydrogen in the air. These gases can come naturally from volcanoes or as a byproduct of the burning of fossil fuels such as coal and oil.

12. What percentage of historic fresh and saltwater tidal marshes in the San Francisco Bay estuary have been lost over the past 150 years?

Ninety-five percent of all San Francisco Bay estuary tidal marshes have been lost to human activity. Golden Gate National Recreation Area preserves and protects some of the bay's remaining marsh lands.

13. What is a composite volcano?

A composite volcano is a steep-sided, symmetrical cone of large dimension built around layers of lava flows, volcanic ash, and cinders that may rise as much as 8,000 feet or more above their bases. Some of the best-known composite volcanoes include Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mayon volcano in the Philippines, Mount Shasta in California, and Mount Rainier National Park in Washington.

National Park Areas preserve and protect some of the planets most amazing natural wonders. Test and improve your knowledge of National Parks earth science trivia by reading the following questions and answers. Then you can quiz your family and friends! These questions reflect only a small fraction of what there is to know about parks so when you visit parks be sure to ask lots of questions!