Science
This gas makes up about 21% of Earth's atmosphere and is essential for human respiration.
Oxygen
This American company, founded in 1976 by Steve Jobs, Steve Wozniak and Ronald Wayne, became famous for personal computers and later the iPhone.
Apple
This U.S. structure, completed in 1937, connects San Francisco and Marin County and is famous for its suspension design.
the Golden Gate Bridge
This New York City museum is one of the world's most famous museums of modern and contemporary art.
the Museum of Modern Art
If a U.S. school has 5 classes with 20 students each, how many students are there in total?
100
In 1928, Scottish-born scientist Alexander Fleming discovered this substance at St. Mary's Hospital in London; it later became one of the most important antibiotics used in American medicine.
penicillin
Developed in the United States in the 1960s, this system became the foundation for much of today's Internet by using packet switching and connecting computers across different locations.
ARPANET
The Wright brothers conducted their famous first powered flight in this U.S. state in 1903.
North Carolina
This musical genre, developed primarily by African Americans in the early 20th-century United States, is characterized by improvisation and became a major influence on global music.
jazz
NASA uses this mathematical constant, approximately 3.14159, when calculating measurements involving circles and spheres.
pi
NASA's Apollo missions brought samples of this celestial body's surface back to Earth for scientific study.
Moon
This programming language was created at Bell Labs in the early 1970s by Dennis Ritchie and became enormously influential in operating systems and later programming languages.
C programming language.
This massive American infrastructure project, completed in 1936, created one of the world's largest reservoirs and provides hydroelectric power and water to the Southwest.
Hoover Dam
This Japanese art form involves creating pictures by folding paper, often beginning with a square sheet and using folds rather than cuts or glue.
origami
A fair six-sided die is rolled twice. What is the probability that the sum of the two rolls is exactly 7?
1/6
In 1953, American scientists James Watson and Francis Crick proposed the famous double-helix model of this molecule, building on crucial experimental evidence from other researchers.
DNA
This NASA spacecraft, launched in 1977, became the first human-made object to enter interstellar space.
Voyager 1
Engineers at NASA's Jet Propulsion Laboratory developed this technique that allowed the Mars rovers Spirit and Opportunity to navigate and operate millions of kilometers away from Earth.
autonomous robotic navigation
This artistic movement, which emerged in France in the late 19th century, is associated with artists such as Claude Monet and Pierre-Auguste Renoir and focused on capturing light and everyday scenes with visible brushstrokes.
Impressionism
A train travels 240 km in 3 hours. If it increases its average speed by 20%, how long will it take to travel the same 240 km?
2.5 hours
The first direct detection of gravitational waves was announced in 2016 by this U.S.-based observatory, confirming a major prediction of Einstein's general relativity.
the Laser Interferometer Gravitational-Wave Observatory?
This 1989 invention by British scientist Tim Berners-Lee at CERN transformed the Internet by introducing a system of interconnected hypertext documents accessed through browsers.
the World Wide Web
Unlike most rocket engines that require an ignition system, the Apollo Lunar Module's descent engine used propellants that ignite spontaneously when they come into contact.
hypergolic propellants
This American composer wrote Rhapsody in Blue, which premiered in 1924 and famously combined elements of classical music with jazz.
George Gershwin
A sequence begins: 2, 6, 12, 20, 30, __. What number comes next?
42