Represented by the symbol Na, this alkali metal reacts violently with water and combines with chlorine to form table salt.
Sodium
Located in the throat, this cartilaginous organ contains the vocal cords and is commonly known as the voice box.
larynx
This subatomic particle, discovered by James Chadwick in 1932, carries no electric charge and is found in the nucleus of an atom.
neutron
Spanning from 1929 into the late 1930s, this severe worldwide economic downturn began after the U.S. stock market crash on "Black Tuesday."
The Great Depression
This literary device occurs when non-human objects or abstract concepts are given human traits, emotions, or behaviors.
personification
Signed in 1215 at Runnymede, this document limited the power of the English King and laid the groundwork for constitutional law.
The Magna Carta
Written by Mary Shelley in 1818, this classic Gothic novel carries the subtitle The Modern Prometheus.
Frankenstein
Formed by the collision of the Indian and Eurasian tectonic plates, this mountain range contains the world's highest peaks.
Himalayas
This European capital city is bisected by the Danube River, separating its two historically distinct sections: Buda and Pest.
Budapest
Measuring over 1,200 miles off the coast of Queensland, Australia, this is the world's largest living structure.
The Great Barrier Reef
This post-impressionist painter famously cut off part of his own ear and created iconic works such as The Starry Night and Sunflowers.
Vincent van Gogh
Named after an Italian scientist, this physical constant—approximately 6.022 times 10^{23}—represents the number of particles in one mole of a substance.
Avogadro's number
Fought in 1863 in Pennsylvania, this three-day battle is often considered the most critical turning point of the American Civil War.
Battle of Gettysburg
Launched in October 1957 by the Soviet Union, this was the world's first artificial satellite, kicking off the Space Race.
Sputnik 1
This form of Japanese poetry consists of three phrases with a 5, 7, 5 syllable structure, traditionally focusing on nature or seasons.
Haiku
Located between Jordan and the West Bank, this hyper-saline lake sits at the lowest land elevation on Earth.
Dead Sea
This African capital city, located near the Nile River Delta, is the largest city in the Arab world.
Cairo
Home to the ancient ruins of Chichen Itza, this Mexican peninsula separates the Gulf of Mexico from the Caribbean Sea.
Yucatán Peninsula
In music theory, this term describes an eight-note interval separating two notes of the same pitch class.
octave
Depicting a figure with an agonized expression against a swirling orange sky, this iconic expressionist painting was created by Edvard Munch in 1893.
The Scream
This composer composed his famous 9th Symphony, featuring the "Ode to Joy," after becoming completely deaf.
Ludwig van Beethoven
Painted on the ceiling of the Sistine Chapel between 1508 and 1512, this famous fresco depicts God giving life to the first human.
The Creation of Adam
At 19,341 feet, Mount Kilimanjaro is the highest peak on this continent.
Africa
Located off the southeast coast of Africa, this island nation is famous for its unique biodiversity, including lemurs found nowhere else on Earth.
Madagascar
Marked by a boundary called the event horizon, this region of spacetime exhibits gravitational acceleration so strong that nothing, not even light, can escape it.
A black hole