Which desert is on the US-Mexico border?
Which is the only US state to border one other state?
Which is the smallest country that shares a border with Austria?
Czech Republic | Switzerland | Slovakia | Liechtenstein
What is the official motto of the United States?
What is the oldest university in the United States?
What colour are the stars on the United States flag?
Blue | White | Yellow | Red
In which century did the United States of America begin using decimalised currency?
1700s | 1800s | 1900s | 1600s
In what year was the first Christmas stamp issued in the United States?
1945 | 1971 | 1962 | 1850
Which law in gas dynamics states that at a constant temperature, the pressure of a gas is inversely proportional to its volume?
Charles' Law | Avogadro's Law | Gay-Lussac’s Law | Boyle's Law
Which four U.S. states have borders along Lake Erie?
Michigan, Indiana, Ohio, Kentucky | Illinois, Indiana, Michigan, Ohio | Michigan, Ohio, Pennsylvania, New York | Wisconsin, Illinois, Indiana, Michigan
