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 | Slovakia | Switzerland | 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?
White | Red | Blue | Yellow
In which century did the United States of America begin using decimalised currency?
1600s | 1700s | 1900s | 1800s
In what year was the first Christmas stamp issued in the United States?
1945 | 1850 | 1971 | 1962
Which law in gas dynamics states that at a constant temperature, the pressure of a gas is inversely proportional to its volume?
Avogadro's Law | Gay-Lussac’s Law | Boyle's Law | Charles' Law
Which four U.S. states have borders along Lake Erie?
Wisconsin, Illinois, Indiana, Michigan | Michigan, Indiana, Ohio, Kentucky | Illinois, Indiana, Michigan, Ohio | Michigan, Ohio, Pennsylvania, New York
