1 / 5
How many years ago did the Colorado River carve the Grand Canyon?
5 million years ago
270 million years ago
1.8 billion years ago
1 / 5
What species of cotton is grown the most in Arizona?
Pima cotton
Tree cotton
Upland cotton
1 / 5
What HVAC technology was invented in Arizona?
Air conditioning
Evaporative cooler
Heat pump
1 / 5
What Arizona crop can survive on only one rainfall?
Dates
Lettuce
Tepary beans
1 / 5
What U.S. president has a town in Arizona named after him?
Calvin Coolidge
Warren G. Harding
Herbert Hoover
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