Only half polled knew what "fracking" was, and only 1 in 5 knew that nitrogen makes up most of Earth's atmosphere.
Can you identify the gas that makes up most of Earth's atmosphere? If yes, you may be surprised to be among the minority in the United States. (Hint: It's not oxygen.) But if you know which kind of radiation that sunscreen protects against, you're in good company.
The American public's knowledge of basic science and technology varies widely, according to the results of a 13-question survey by the Pew Research Center and Smithsonian magazine.
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