Maths
This is the perimeter of a rectangle with length 9 and width 4.
What is 26?
These tiny organisms can be helpful, like in yogurt, or harmful, like causing infections.
What are bacteria?
This mountain range stretches across northern Iran and includes the country’s highest peak.
What are the Alborz Mountains?
This ancient empire built a 250,000‑mile road system that helped it control territory across three continents.
What is the Roman Empire?
This giant clock tower in London is one of the most famous landmarks in the United Kingdom.
What is Big Ben?
This tool is used to measure angles.
What is a protractor?
This part of your body makes antibodies to fight germs.
What is the immune system?
This large saltwater lake in northwestern Iran has been shrinking for decades and is known for its bright red color.
What is Lake Urmia?
This trade route connected China to the Mediterranean and helped spread goods, ideas, and even diseases.
What is the Silk Road?
This ancient city in Peru sits high in the Andes Mountains and was built by the Inca civilization.
What is Machu Picchu?
A number that can be divided only by 1 and itself.
What is a prime number?
These proteins on the surface of pathogens trigger your immune system to respond.
What are antigens?
This Persian mathematician and astronomer wrote the Rubaiyat, a collection of quatrains later translated worldwide.
Who is Omar Khayyam?
This document, signed in 1215, limited the power of the English king and influenced modern democracy.
What is the Magna Carta?
This ancient amphitheater in Rome once hosted gladiator battles and could hold over 50,000 spectators.
What is the Colosseum?
The point where two lines meet to form an angle.
What is a vertex?
This structure in bacteria protects against drying out and helps them evade the immune system.
What is a capsule?
This remote stepped village in West Azerbaijan is built entirely from stone and is known for its unique conical, beehive‑shaped houses.
What is Kandovan?
This medieval pandemic killed millions in Europe and was spread partly by fleas on rats.
What is the Black Death?
This massive sandstone rock in Australia is sacred to the Aboriginal people and changes color at sunrise and sunset.
What is Uluru (Ayers Rock)?
Reza is 4 years older than Sara.
In 6 years, the sum of their ages will be 40.
Sara is 12, Reza is 16.
These enzymes cut DNA at specific sequences and are essential tools in genetic engineering.
What are restriction enzymes?
This major Iranian contemporary music festival, held annually in Tehran, showcases experimental, classical, and fusion performances by emerging Iranian composers.
What is the Fajr Music Festival?
This ancient Greek city‑state was known for its strict military training and discipline.
What is Sparta?
This ancient temple complex in Cambodia is the largest religious monument in the world.
What is Angkor Wat?