English Grammar
Math
Science
Geography
History
100

What is the zero conditional?

This conditional is used to express general truths or facts that are always true.

100

What is 180 degrees?

 The sum of the angles in any triangle is this number of degrees.
 

100

What is photosynthesis?

This process allows plants to make food using sunlight, water, and carbon dioxide.

100

What is the Nile River?

This is the longest river in the world.
 

100

What is the Magna Carta?

This famous document, signed in 1215, limited the power of the king of England and is considered one of the first steps towards modern democracy.
 

200

What is a verb?

This part of speech typically describes actions, states, or occurrences and is an essential part of a sentence.

200

 What is a prime number?

This is the term used for a number that is divisible only by 1 and itself.
 

200

 What is gravity?

The force that attracts objects towards the center of the Earth is called this.
 

200

What is the Atacama Desert?

This desert, located in northern Chile, is considered the driest place on Earth, receiving less rainfall than Antarctica.
 

200

: What is the Declaration of Independence?

This event, which occurred in 1776, declared the American colonies' independence from Britain.
 

300

What are adjectives?

These are words that describe nouns, providing more information about them.

300

What is subtraction?

 This mathematical operation involves finding the difference between two numbers.
 

300

What is nitrogen?

This is the chemical element that makes up the majority of the Earth's atmosphere.
 

300

 What are the Alps?

 This mountain range stretches across Europe, separating the plains of Central Europe from the Mediterranean.
 

300

What is Ancient Egypt?

 This ancient civilization built the pyramids and developed a system of writing known as hieroglyphics.
 

400

What is the present simple tense?

This tense is used for actions happening right now or regularly.

400

 What is 64?

This number is the only one that is both a perfect square and a perfect cube, and it is also known as the first non-zero perfect power.
 

400

 What is the theory of continental drift?

This theory, proposed by Alfred Wegener in 1912, suggests that continents have drifted over geological time and were once part of a single landmass called Pangaea.
 

400

What is Russia?

This is the largest country in the world by land area.
 

400

What is Ancient Egypt?

 This ancient civilization built the pyramids and developed a system of writing known as hieroglyphics.
 

500

What is the third conditional?

This is the grammatical term for a sentence that expresses a condition that is unlikely or hypothetical and uses the past perfect form in its structure.

500

 What is πr² (pi times the radius squared)?

This formula calculates the area of a circle, using this constant, and the radius of the circle.
 

500

 What is nuclear fission?

This process involves the splitting of an atomic nucleus, releasing a significant amount of energy.
 

500

 What is the Pacific Ocean?

This ocean is the largest and deepest on Earth.
 

500

 What is the Peace of Westphalia?

This treaty, signed in 1648, ended the Thirty Years' War in Europe and marked the beginning of the modern system of nation-states.