50% knows the answer to this question: "What were the series of wars by European Christians to recover the Holy Land from the Muslims? "

And do you know the answer to this one? "What does the word "constellation" mean?"

76% knows the answer to this question: "Which continent was devastated by an enormous tsunami in December of 2004? "

And do you know the answer to this one? "What is the capital city of the Central American country of Guatemala?"

67% knows the answer to this question: "Which scientific term is best defined as "the area influenced by an object's gravity"? "

And do you know the answer to this one? "Rastafarians and dreadlocks are associated with what island's culture?"

67% knows the answer to this question: "What is the process of a river washing away its riverbanks called? "

And do you know the answer to this one? "The Louvre is located in what country?"

50% knows the answer to this question: "What is a change in the form of a species over time called? "

And do you know the answer to this one? "What is the name of the leader who ruled Cuba for 49 years until 2008?"

69% knows the answer to this question: "What would you call "a sense of tiredness and losing stamina"? "

And do you know the answer to this one? "Where was Nelson Mandela imprisoned?"

86% knows the answer to this question: "Which country's government is communist? "

And do you know the answer to this one? "What country is just north of the border of the United States?"

82% knows the answer to this question: "What Cold War landmark was dismantled on November 11, 1989? "

And do you know the answer to this one? "Britain's Stonehenge is called a megalith because it is made of what?"

54% knows the answer to this question: "Which body part of a human senses light information? "

And do you know the answer to this one? "Which two letters are used to indicate years that occurred before the birth of Jesus?"

73% knows the answer to this question: "Ottawa is the capital of which country? "

And do you know the answer to this one? "Roman men wore togas and Roman women wore what?"

63% knows the answer to this question: "What word means "pertaining to medical care"? "

And do you know the answer to this one? "What is the liquid component of blood known as?"

37% knows the answer to this question: "At a 1998 conference, what single currency did 12 European nations agree to adopt? "

And do you know the answer to this one? "What is damage to the brain called, in a medical context?"