31 Chameleons change colors to blend in with their surroundings.

Yes, chameleons do have the ability to change colors, but the falsity here lies in why they do so. According to Wired, chameleons change colors to regulate their temperatures or communicate with other chameleons, not to camouflage themselves.

32 The Declaration of Independence was signed on July 4th.

While Congress indeed approved the final declaration on July 4, 1776, the document wasn't signed until Aug. 2 of that year.