21st's 1st's
In 2008, he became the first African-American President of the United States
Who is Barack Obama?
This ancient Egyptian queen was famous for her beauty and her alliances with Julius Caesar and Mark Antony.
Who was Cleopatra?
This fundamental force of nature keeps the planets in orbit and was famously described by Isaac Newton.
What is Gravity?
This term refers to the process of a species or population changing over time to better suit its environment
What is Development (or Darwinism)?
This is the mathematical term for the "flip" of a fraction, such that their product is 1
What is a reciprocal?
In 2005, the first-ever video, titled "Me at the zoo," was uploaded to this platform that now sees 500 hours of video uploaded every minute.
What is YouTube?
To protect against northern invasions, this massive stone structure was built across thousands of miles in China.
What is the Great Wall of China?
This part of the ear, also known as the tympanic membrane, vibrates in response to sound waves.
This "D" word describes a substance that is capable of being drawn out into a thin wire
What is Ductile?
This 7-letter word describes a line that touches a circle at exactly one point without crossing it
What is a tangent?
In 2021, this billionaire founder of Amazon became the first person to fly on his own private company's rocket, the New Shepard, into suborbital space
Who is Jeff Bezos?
In 1492, this Italian explorer sailed across the Atlantic under the Spanish flag, reaching the Americas.
Who was Christopher Columbus?
This type of rock is formed when existing rock is subjected to intense heat and pressure, changing its form without melting.
What is Metamorphic?
Loss of water from a substance or the body
What is dehydration?
In this set of numbers {2, 4, 4, 7, 9}, this number is the MODE
What is 4?
In 2019, an international team of scientists used the Event Horizon Telescope to capture the first ever direct image of this celestial phenomenon in the galaxy M87
What is a Black Hole?
This South African leader spent 27 years in prison before becoming the country's first Black president in 1994.
Who is Nelson Mandela?
This light-year-measuring phenomenon occurs when a massive star exhausts its fuel and collapses, resulting in a giant explosion.
What is a Supernova?
In biology, this "D" term describes animals active during the day as opposed to its antonym which means most active at nighttime
What is Diurnal?
In a set of data, this is the difference between the highest and the lowest values; in music, it’s the distance between the lowest and highest notes a singer can hit
What is the range?
In 2016, this country became the first to officially vote to leave the European Union, a move famously known as "Brexit".
What is the United Kingdom?
This legendary Greek conqueror created one of the largest empires in history, stretching from Greece to India, by age 30.
This property of a fluid describes its resistance to flow; honey has a high level of it, while water has a low level.
What is Viscosity?
This 10-letter word describes the process by which a gas turns directly into a solid, skipping the liquid phase entirely
A Googol is the number 1 followed by this many zeroes
What is 100?