This instrument, with 88 keys, is both a string and percussion instrument.
What is the piano?
Historians rely on these—letters, photographs, diaries, or artifacts—to construct accounts of the past.
What are primary sources?
This scientist’s theory of evolution changed how humans understand life on Earth and illustrates how knowledge can evolve over time.
Who was Charles Darwin?
This discipline studies societies, cultures, and human interactions over time and place.
What is anthropology?
This branch of math concerns shapes, sizes, and the properties of space.
What is geometry?
This Spanish artist painted Guernica, a mural protesting the horrors of war.
Who was Pablo Picasso?
The Treaty of Versailles ended this major global conflict in 1919.
What was World War I?
This gas, making up about 78% of Earth’s atmosphere, is essential for plant protein formation.
What is nitrogen?
In economics, this term describes a market with a single seller dominating all competition.
What is a monopoly?
This states that in a right-angled triangle, the square of the hypotenuse equals the sum of the squares of the other two sides.
What is the Pythagorean theorem?
In ballet, this French word refers to a full turn of the body on one foot.
What is pirouette?
This U.S. document, ratified in 1788, replaced the Articles of Confederation and established the framework of the federal government.
What is the U.S. Constitution?
In genetics, this term describes the observable traits of an organism determined by its genes.
What is a phenotype?
Abraham Maslow is best known for his hierarchy of these.
What are needs?
This 17th-century mathematician co-invented calculus and developed the laws of motion.
Who is Isaac Newton?
This 20th-century art movement, led by Salvador Dalí, explored dreamlike and irrational imagery.
What is Surrealism?
A far-right, authoritarian political ideology characterized by extreme nationalism, a powerful, centralized government under a single leader, and the suppression of all political opposition.
What is fascism?
This term describes the bending of light as it passes from one medium to another.
What is refraction?
This economic principle describes the scarcity of resources relative to unlimited human wants.
What is supply and demand?
The discovery of non-Euclidean geometry showed that mathematical systems depend on starting assumptions, also known as these.
What are axioms?
This 20th-century Mexican muralist used art to highlight indigenous culture and social struggle.
Who is Diego Rivera?
The idea that historical events and their interpretations must be understood within their own time period's context, free from modern judgments
What is Historical Relativism?
This branch of physics studies the behavior of particles at extremely small scales, governed by wave-particle duality.
What is quantum mechanics?
This researcher’s experiments with dogs led to the discovery of classical conditioning.
Who is Ivan Pavlov?
This mathematician’s “last theorem” was famously proven by Andrew Wiles in 1994.
Who is Pierre de Fermat?