Ecology ( from οἶκος , `` house '' , or `` environment '' ; - λογία , `` study of '' ) is the scientific analysis and study of interactions among organisms and their environment . Physics . Over the last two millennia , physics was a part of natural philosophy along with chemistry , biology , and certain branches of mathematics , but during the scientific revolution in the 17th century , the natural sciences emerged as unique research programs in their own right .
Physics includes biology.