Which country has the largest population in the world as of recent estimates?

Which gas do plants primarily absorb from the atmosphere for photosynthesis?

The Statue of Liberty was a gift to the United States from which country?

The Sahara Desert is located primarily in which continent?

Who wrote the theory of evolution by natural selection?

Who was the first man to walk on the Moon?

The Great Wall of China was primarily built to protect against invasions from which group?

The Amazon Rainforest is primarily located in which country?

Who is known as the father of the atomic bomb?

The Nobel Prize is awarded annually in memory of which scientist?

Which is the largest ocean in the world by area?