Science
These are the only two planets in our Solar System that do not have moons.
Mercury and Venus
She had a #1 hit in every year of the 90's (the only singer to do so.)
Mariah Carrey
This 9-letter word for an insect may have come about because people believed it ate uncovered dairy products.
Butterfly
Who wrote the Star Spangled Banner
The Colorado River runs through this national park in the state of Arizona
The Grand Canyon
This geologic formation may be found overhead if you are in a cave.
Stalactite
This is the highest voice type in a choral ensemble.
Soprano
Though it means "seasickness" in Latin, this six-letter word now refers to a more general feeling of illness.
Nausea
This purchase doubled the size of the US in 1803.
The Louisiana Purchase.
This is an ancient Greek temple that sits above the city of Athens and was designed to honour Athena, the Greek Goddess.
The Parthenon
This living animal has the heaviest brain.
Sperm Whale
She originally wrote "Titanium" for Alecia Keys, but ended up providing the vocals herself, collaborating with David Guetta.
SIA
This Sanskrit word, referring to a spoken word or phrase, comes from the word "to think."
Mantra
He was the first US president to appear on paper money, on a $10 demand note authorized in 1861.
Abraham Lincoln
DD: This South American landmark is known as the Lost City of the Incas.
Machu Picchu
This popular fruit is known to be mildly radioactive.
Bananas
This composers work include "The Magic Flute" and "The Marriage of Figaro"
Mozart
From the Greek word for ring, the first ones were built by the Romans, including one that could hold 250,000 people.
Circus
In 1945 scientists in this state witnessed the detonation of the world's first atomic bomb.
New Mexico
This waterway is famous for finally opening a passage for ships from the Mediterranean Sea to the Red Sea, thereby avoiding the treacherous trip around the Cape of Good Hope in Africa.
Suez Canal
It's the most plentiful element in the Earth's atmosphere.
Nitrogen
This is Jay-Z's real name.
Sean Carter
DD: P.T. Barnum, whose travelling show carried musicians, coined this term that now represents something growing in popularity.
Band-Wagoning
In his teens, this Pittsburgh pickle king was running a business to supply grocers with fresh produce.
Henry Heinz
This landmark is located at 41 degrees North, 74 degrees West
The Statue of Liberty