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Apollo 11 Mission: Mission Overview
"The Apollo 11 mission was the eleventh in a series of flights using Apollo flight hardware and was the first lunar landing of the Apollo Program. It was also the fifth manned flight of the command and service modules and the third flight of the lunar module. The purpose of the mission was to perform a manned lunar landing and return safely to Earth."

Apollo 11 Mission: Science Experiments
"In addition to their sample collection activities, the Apollo 11 crew performed several experiments on the lunar surface. The results of some of these experiments were either radioed to Earth by the crew or returned to Earth for laboratory analysis."