This force keeps planets in orbit around the Sun.
What is gravity
This organelle is known as the “powerhouse of the cell.”
What is the mitochondrion?
This ancient civilization built Machu Picchu.
Who are the Inca?
This economic system is based on private ownership and free markets.
What is capitalism?
This playwright wrote Romeo and Juliet.
Who is Shakespeare?
This element is the most abundant in the universe.
What is Hydrogen
This process allows plants to convert sunlight into chemical energy.
What is photosynthesis?
This wall fell in 1989, symbolizing the end of Cold War divisions in Germany.
What is the Berlin Wall?
This branch of U.S. government interprets laws.
What is the Judicial Branch?
This mathematical constant is approximately equal to 3.14159.
What is pi?
This scientist formulated the three laws of motion.
Who is Isaac Newton?
This molecule carries genetic information in living organisms.
What is DNA?
This document begins with the words “We the People.”
What is the US Constitution?
This amendment granted women the right to vote in the United States.
What is the 19th Amendment?
This Renaissance artist painted the ceiling of the Sistine Chapel.
Who is Michelangelo?
This scale measures the intensity of earthquakes.
What is the Richter Scale
This scientist developed the theory of evolution by natural selection.
Who is Charles Darwin?
This war between the North and South regions of the United States lasted from 1861 to 1865.
What is the American Civil War?
This philosopher co-authored The Communist Manifesto with Friedrich Engels.
Who is Karl Marx?
This novel by George Orwell depicts a dystopian society ruled by Big Brother.
What is 1984?
This subatomic particle has almost no mass?
What is an electron?
This branch of biology focuses on the classification of organisms.
What is taxonomy?
This global conflict from 1939 to 1945 involved the Allied and Axis powers.
What is World War II
This international organization was founded in 1945 to promote peace and cooperation among nations.
What is the United Nations?
This Greek philosopher taught Alexander the Great.
Who is Aristotle?