12scienceWhat do we call those cells in the retina that respond to low levels of light and allow seeing in the dark?Show AnswerLearn MoreShare
4historyWho was the first President to visit all the existing states of the United States while in office?Show AnswerLearn MoreShare
2scienceWhat disease, caused by a deficiency of vitamin C, is characterized by bleeding gums and extreme weakness?Show AnswerLearn MoreShare
8educationWhat educational reformer is known as the 'Father of American Education'?Show AnswerLearn MoreShare
17historyOn August 9, 1963, Jacqueline Kennedy gave birth to a son, who died 2 days later. What was his name?Show AnswerLearn MoreShare
9animalsWhat two breeds of dog are most commonly used as seeing-eye dogs or guide dogs for the blind?Show AnswerLearn MoreShare
17wordsThis Hebrew word means "proper" or "fit", and specifically refers to food prepared according to the orthodox dietary and religious laws. What is the word?Show AnswerLearn MoreShare
14geographyThese two cities, located about 30 miles apart, recently combined their metropolitan areas and now total 10,000 square miles, the fourth largest metropolitan area in the country, after NY, LA, and Chicago. Which two cities are these?Show AnswerLearn MoreShare
20historyOf California, Oregon, and Washington, which was the first to become a U.S. state?Show AnswerLearn MoreShare
8geographyThis city is one of the oldest intellectual centers in Europe. Many of its buildings are over 600 years old. It is located on the Rhine River at the point where Germany, France, and Switzerland all meet. What city is this?Show AnswerLearn MoreShare
5geographyThis river passes through or borders Austria, Switzerland, France, Germany, Luxembourg, and the Netherlands. It is one of the world's primary rivers for transporting goods. What is the name?Show AnswerLearn MoreShare
20wordsWhat word describing a highly cultured person is named for a part of the head?Show AnswerLearn MoreShare
4geographyThe farthest-inland deep water port on the Mississippi River is located 80 miles upstream, at which city?Show AnswerLearn MoreShare