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

The Sahara Desert is located primarily in which continent?

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

Who wrote the theory of evolution by natural selection?

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

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

Who is known as the father of the atomic bomb?

Who was the first man to walk on the Moon?

Which is the largest ocean in the world by area?

The Amazon Rainforest is primarily located in which country?

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