Plagiarism and Copyright

Question 1: http://www.cte.usf.edu/plagiarism/plag.ht

Question 2: To plagiarize is to take and use another person's thoughts, writings as your own, without acknowledging or giving the source of the ideas.

Question 3: To avoid plagiarism, you must give credit whenever you use another person’s idea, opinion, or theory.

Question 4:

Plagiarism is using someone else’s idea (usually a written idea) without giving proper credit for the idea,

Copyright infringement is using someone else’s creative idea, which can include a song, a video, a movie clip, a piece of visual art, a photograph, and other creative works, without authorization or compensation, if compensation is appropriate.

Resources:
http://www.ncte.org/pubs/chron/highlights/122872.htm
http://www.indiana.edu/~wts/pamphlets/plagiarism.shtml#strategies