General Knowledge Quiz for Eighth Graders

Which is the largest continent by land area?

• Africa

• Asia

• Europe

• North America

Answer explanation

Asia is the largest continent by land area, covering approximately 44.58 million square kilometers. It is significantly larger than Africa, Europe, and North America, making it the correct answer.

Who was the first President of the United States?

• Thomas Jefferson

• Abraham Lincoln

• George Washington

• John Adams

Answer explanation

George Washington was the first President of the United States, serving from 1789 to 1797. He is often referred to as the 'Father of His Country' for his leadership during the founding of the nation.

What is the basic economic problem that all societies face?

• Inflation

• Unemployment

• Scarcity

• Recession

Answer explanation

The basic economic problem all societies face is scarcity, which refers to the limited resources available to meet unlimited wants and needs. This fundamental issue drives the need for choices and prioritization in resource allocation.

Which gas is primarily responsible for global warming?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Hydrogen

Answer explanation

Carbon Dioxide is the primary greenhouse gas contributing to global warming, as it traps heat in the atmosphere. Unlike Oxygen, Nitrogen, and Hydrogen, which are not significant in this context, CO2 levels have risen due to human activities.

Who discovered the law of gravity?

• Albert Einstein

• Isaac Newton

• Galileo Galilei

• Nikola Tesla

Answer explanation

Isaac Newton is credited with formulating the law of gravity in the 17th century, explaining how objects attract each other. His work laid the foundation for classical mechanics, distinguishing him from other scientists like Einstein and Galileo.

Which festival is known as the Festival of Lights in India?

• Holi

• Diwali

• Eid

• Christmas

Answer explanation

Diwali, known as the Festival of Lights, is celebrated in India by lighting lamps and candles to symbolize the victory of light over darkness. Holi, Eid, and Christmas are significant festivals but do not carry this title.

Which river is the longest in the world?

• Amazon

• Nile

• Yangtze

• Mississippi

Answer explanation

The Nile is traditionally considered the longest river in the world, measuring about 6,650 kilometers. While the Amazon is often debated due to its length, the Nile remains the accepted longest river in most references.

Who was the famous leader of the Indian independence movement?

• Jawaharlal Nehru

• Subhas Chandra Bose

• Mahatma Gandhi

• Bhagat Singh

Answer explanation

Mahatma Gandhi was the most prominent leader of the Indian independence movement, known for his philosophy of non-violence and civil disobedience, which inspired millions in the struggle against British rule.

What is the term for the total value of all goods and services produced in a country in a year?

• Gross Domestic Product (GDP)

• Net National Product (NNP)

• Gross National Product (GNP)

• Consumer Price Index (CPI)

Answer explanation

The term for the total value of all goods and services produced in a country in a year is Gross Domestic Product (GDP). It measures the economic performance of a country.

Which layer of the Earth is responsible for its magnetic field?

• Crust

• Mantle

• Outer Core

• Inner Core

Answer explanation

The Earth's magnetic field is generated by the movement of molten iron and nickel in the Outer Core. This fluid motion creates electric currents, which in turn produce the magnetic field, making the Outer Core the correct answer.