The term plagiarism refers to taking and using another person’s ideas, writing or inventions as one’s own and failing to acknowledge the source.
Plagiarism can be avoided by acknowledging the sources of information used in written work.
Plagiarism means to knowingly or unknowingly present as one’s own work the ideas or writings of another without appropriate acknowledgment or referencing.
Copyright is the legal right to deal with certain works and other subject matter in a particular way. It is protected by the Copyright Act 1968, which sets out various legal rights, obligations and remedies. Copyright infringement is the act of dealing with works and other subject matter contrary to that legal framework.
At its simplest, copyright is the exclusive right to copy. The rights are granted exclusively to the copyright owner to reproduce (copy, scan, print) and communicate (email, put on Internet) the material, and for some material, the right to perform or show the work to the public. Only the copyright owner can licence or sell these rights to someone else. Source: Smartcopying website.