Americans are enthusiastic about the promise of science but lack basic knowledge of it, with one in four unaware that the Earth revolves around the Sun, said a poll out Friday. The survey included more than 2,200 people in the United States and was conducted by the National Science Foundation. Nine questions about physical and biological science were on the quiz, and the average score -- 6.5 correct -- was barely a passing grade. Just 74 percent of respondents knew that the Earth revolved around the Sun, according to the results released at the American Association for the Advancement of Science meeting in Chicago. Fewer than half (48 percent) knew that human beings evolved from earlier species of animals. The result of the survey, which is conducted every two years, will be included in a National Science Foundation report to President Barack Obama and US lawmakers. One in three respondents said science should get more funding from the government. Nearly 90 percent said the benefits of science outweigh any dangers, and about the same number expressed interest in learning about medical discoveries.