Science
What is the pH of pure water at 25°C?
The pH of pure water at 25°C is 7, which is neutral. This means that the concentration of hydrogen ions (H⁺) and hydroxide ions (OH⁻) is equal.
Which continent has the most countries?
Africa is the continent with the most countries, comprising 54 recognized countries.
Who was the first European to sail to India by sea,?
Vasco da Gama was the first European to sail directly to India by sea, reaching the port of Calicut in 1498.
Which country has won the most Olympic gold medals in history,?
The United States has won the most Olympic gold medals in history, with a total of 1180 golds
You see a boat filled with people, yet there isn’t a single person on board. How is that possible?
All the people on the boat are married. So, there’s not a "single" person.
What is the primary gas in Earth's atmosphere, and what percentage does it make up?
nitrogen (N₂), which makes up about 78% of the atmosphere.
(70-86% answer accepted)
Which two countries share the longest land border in the world?
The United States and Canada share the longest land border in the world, stretching about 8,891 kilometers
Who was the longest-reigning British monarch before Queen Elizabeth II,?
The longest-reigning British monarch before Queen Elizabeth II was Queen Victoria, who reigned for 63 years and 216 days, from 1837 to 1901.
Which country won the first FIFA World Cup in 1930?
Uruguay won the first FIFA World Cup in 1930, and it was held in Uruguay itself
What can travel around the world while staying in the corner?
A stamp stays in the corner of an envelope but can travel around the world.
What is the Richter scale used to measure?
The Richter scale is used to measure the magnitude of earthquakes, which quantifies the energy released during an earthquake.
Which island is the largest in the Caribbean by land area?
Cuba is the largest island in the Caribbean by land area, covering about 109,884 square kilometers
Which Greek philosopher is famous for the phrase "I know that I am intelligent because I know that I know nothing,"?
The philosopher Socrates is famous for this phrase and was sentenced to death by the Athenian court in 399 BCE for corrupting the youth of Athens and impiety.
Who won the most Formula 1 World Championships, and how many titles do they have?
Michael Schumacher and Lewis Hamilton are tied for the most Formula 1 World Championships, each with 7 titles.
1 champion accepted and 6-8 accepted
What gets sharper the more you use it?
Your brain. Using your mind sharpens your thinking skills.
Which planet in our solar system has the most moons, and how many does it have?
Saturn has the most moons, with 86 confirmed moons.
(70-100 accepted)
Where is the Grand Canyon located? (country+state)
The Grand Canyon is a massive canyon carved by the Colorado River in the state of Arizona, USA.
Which countries were the main members of the Triple Alliance during World War I?
The Triple Alliance during World War I consisted of Germany, Austria-Hungary, and Italy.
Which football player holds the record for the most goals scored in a calendar year,?
Lionel Messi holds the record for the most goals scored in a calendar year, with a total of 91 goals in 2012.
I’m light as a feather, yet the strongest man can’t hold me for much longer than a minute. What am I?
You can hold your breath, but eventually, you’ll have to exhale.
Which planet has the shortest day in the solar system?
Jupiter (its day lasts about 10 hours).
What is the tallest waterfall in the world?
Angel Falls in Venezuela (979 meters).
Which African nation was the first to gain independence from colonial rule in the 20th century?
Ghana was the first African nation to gain independence from colonial rule. It achieved independence from the United Kingdom on March 6, 1957.
Which city will host the 2028 Summer Olympics?
Los Angeles will host the 2028 Summer Olympics.
What has keys but can’t open locks?
A piano has keys but cannot open locks.