Which pioneering scientist helped NASA send astronauts to space with her mathematical calculations?
What is the largest ocean on Earth?
Which of these fractions is greater than 1/2?
Which famous speech begins with the words, "I have a dream"?
Which word means the condition of the atmosphere?
Who refused to give up her seat on a Montgomery bus, sparking the Montgomery Bus Boycott?
Who was the first African American woman elected to the U.S. Congress?
Who founded the Universal Nego Improvement Association (UNIA)?
What is the capital of Pennsylvania?