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a science that deals with things that are alive, such as plants and animals; the study of life
capable of being slowly destroyed and broken down into very small parts by natural processes, bacteria, etc.
the story of a real person's life written by someone other than that person
the art, process, or job of taking pictures with a camera; named after the original process that used light to expose an image on special paper
the process by which a green plant turns water and carbon dioxide into food when the plant is exposed to light
a tiny particle of light or electromagnetic radiation
a US city founded by William Penn, a Quaker who believed in peace
a wealthy person who gives money and time to help make life better for other people
the study of ideas about knowledge, truth, the nature and meaning of life; your personal beliefs or opinions related to life
a person who loves or collects books