Science Daily:

Are Americans flunking science? A new national survey commissioned by the California Academy of Sciences and conducted by Harris Interactive® reveals that the U.S. public is unable to pass even a basic scientific literacy test.
Over the past few months, the American government has allocated hundreds of billions of dollars for economic bailout plans. While this spending may provide a short-term solution to the country’s economic woes, most analysts agree that the long-term solution must include a transition to a more knowledge-based economy, including a focus on science, which is now widely recognized as a major driver of innovation and industry.
Despite its importance to economic growth, environmental protection, and global health and energy issues, scientific literacy is currently low among American adults. According to the national survey commissioned by the California Academy of Sciences:
Only 53% of adults know how long it takes for the Earth to revolve around the Sun.