primary source
A source created at the time by someone directly involved, such as a speech, diary, photo or interview.
secondary source
A source created later by someone who studied the event, such as a textbook, article or documentary.
credibility
How trustworthy and believable a source is.
bias
A one-sided slant that can make a source leave out or stress certain facts.
foundation
A nonprofit organization that raises and gives out money for a cause.
nonprofit
An organization that uses any money it earns for its mission instead of paying owners a profit.
humanitarian
Working to reduce human suffering, for example through medical care or disaster relief.