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