Grand Canyon

What is the Grand Canyon often described as?

• A. Earth's greatest geological showcase

• B. Earth's largest waterfall

• C. Earth's deepest cave

• D. Earth's highest mountain

What is the name of the Grand Canyon in Hopi language?

• A. Ongtupqa

• B. Wi:kaʼi:la

• C. Grand Canyon

• D. Colorado River

How long is the Grand Canyon?

• A. 277 miles

• B. 446 km

• C. 18 miles

• D. 29 km

What does the name 'Colorado' mean in Spanish?

• A. Colored red

• B. Mighty river

• C. Rocky mountains

• D. Grand canyon

What is the largest reservoir in the United States formed by the Colorado River?

• A. Lake Mead

• B. Lake Powell

• C. Lake Tahoe

• D. Lake Superior

How old is the Grand Canyon according to geologists?

• A. 5 million years

• B. 70 million years

• C. 2 billion years

• D. Geologists disagree

What are the oldest rocks exposed at the bottom of the Grand Canyon called?

• A. Vishnu Basement Rocks

• B. Supergroup Rocks

• C. Paleozoic Age Rocks

• D. Volcanic Rocks

What causes the distinctive reddish colors of the Grand Canyon's sandstone beds?

• A. Iron oxide and pink feldspar grains

• B. Volcanic ash and lava

• C. Colorado River silt

• D. Baking by the sun

What is the name of the horseshoe-shaped bridge at the Grand Canyon?

• A. Grand Canyon Skywalk

• B. Colorado River Bridge

• C. Eagle Point Bridge

• D. Hoover Dam Bridge

Who established the Grand Canyon as a U.S. National Monument?

• A. Theodore Roosevelt

• B. Thomas Jefferson

• C. Abraham Lincoln

• D. George Washington