What do you call a wealthy person who gives money and time to help make life better for other people?

The root word bio means-

What is it called if I write about the life of another person?

Photosynthesis occurs only in-

A __________________ is someone who loves and collects books.

The art, process, or job of taking pictures with a camera is called -

The study of ideas about knowledge, truth, and the nature and meaning of life is -

The root word photo means-

A ____________ is a tiny particle of light .

The root word phil means -

If something is _________________, then it is capable of being slowly destroyed and broken down into very small parts by natural processes, bacteria, etc.

Philadelphia is a city founded by William Penn. The name Philadelphia means-