Watch the pathfinder scene from the martian movie. Having successfully used Pathfinder to contact earth, Matt Damon’s character realizes he needs a better system than just Yes or No. Starting at 49’ 20” in the movie, Matt Damon's character discusses the Hexadecimal and ASCII systems. I wasn't able to find the whole scene, but you can watch part of the hexadecimal scene from The Martian.
Download this worksheet, decode the three hexadecimal messages and type in your answers. Save your worksheet and check your answers at the URL listed at the bottom of the worksheet. Submit your worksheet to Google classroom.