"Would Google Glass collect any data about the user without the user's knowledge and consent," the lawmakers wrote. "If so, why? If not, please explain."
Moorhead expects that Google will quickly answer the questions in an effort to calm members of Congress.
"Google will need to establish and publicly provide this information or risk a subpoena to testify before Congress," Moorhead said. "I believe they will answer these questions as to not drag their name through the mud on live C-SPAN."
Sharon Gaudin covers the Internet and Web 2.0, emerging technologies, and desktop and laptop chips for Computerworld. Follow Sharon on Twitter at @sgaudin, or subscribe to Sharon's RSS feed . Her email address is firstname.lastname@example.org.
Read more about emerging technologies in Computerworld's Emerging Technologies Topic Center.