Often called the "powerhouse of the cell," this organelle generates most of a cell's supply of energy.
What is the mitochondria
This ancient network of trade routes connected China to the Mediterranean Sea.
What is the Silk Road
In Lois Lowry’s dystopian novel The Giver, Jonas is selected to hold this highly respected, titular job.
What is the Receiver of Memory
This mountain range acts as the traditional natural boundary separating Europe from Asia.
What are the Ural Mountains
The word "dinosaur" was coined in 1841 and comes from Greek words meaning this kind of "lizard."
What is terrible
This state of matter occurs when a gas becomes highly ionized, like in lightning or neon signs.
What is plasma
This famous queen of ancient Egypt was the last active ruler of the Ptolemaic Kingdom.
Who is Cleopatra
Ponyboy Curtis is the narrator of this classic S.E. Hinton novel about rival gangs, the Greasers and the Socs
What is The Outsiders
This African river is generally considered the longest in the world, flowing north into the Mediterranean Sea.
What is the Nile River
The third month of the year is named after this Roman god of war.
Who is Mars
On the periodic table, this precious metal is represented by the symbol "Au".
What is gold
This pandemic swept through Europe and Asia in the 14th century, heavily reducing the global population.
What is the Black Death (or Bubonic Plague)
This classic novel by Madeleine L'Engle features a "tesseract," which folds space and time.
What is A Wrinkle in Time
The Galápagos Islands, famous for their unique wildlife studied by Charles Darwin, belong to this South American country.
What is Ecuador
The term "astronaut" translates literally from Greek to mean this kind of sailor.
What is a star sailor
This type of rock, like pumice or obsidian, is formed entirely by the cooling and solidifying of magma or lava.
What is igneous rock
The Magna Carta, a document that limited the king's power and established that everyone is subject to the law, was signed in this country in 1215.
What is England
In Harper Lee's To Kill a Mockingbird, this is the actual first name of the reclusive neighbor known as "Boo" Radley.
What is Arthur
This narrow strip of water separates Spain from Morocco and connects the Atlantic Ocean to the Mediterranean Sea.
What is the Strait of Gibraltar
The martial art "karate" translates from Japanese to mean this kind of hand.
What is an empty hand
This is the term for the process where a solid changes directly into a gas without becoming a liquid first, like dry ice does.
What is sublimation
This major conflict between Athens and Sparta reshaped the ancient Greek world.
What is the Peloponnesian War
The poem Jabberwocky, full of nonsense words like "brillig" and "slithy," was written by this English author.
Who is Lewis Carroll
This is the deepest oceanic trench on Earth, located in the western Pacific Ocean.
What is the Mariana Trench
This word for a very large number (a 1 followed by 100 zeros) was coined by the 9-year-old nephew of mathematician Edward Kasner.
What is a googol