is the law that protects someone's original work.  It protects things like music, pictures, poems, stories, and movies.  Copyright starts as soon as the work is created and doesn't require registration. However, anyone who is creating works that may make lots of money or be famous usually register for a copyright with the US Copyright Office. If the copyright is registered, then the owner can file a lawsuit if there is a problem.

What does not fall under copyright? facts, ideas, concepts, fashion, works created by the US government, and familiar words or symbols

Plagiarism is where you use someone else's original work as your own.  You don't ask permission or cite (give credit to the author).

Google has tools that can help you with copyright.  When you search for pictures, you can use the Search Tools, and Usage Rights guidelines.  When you are using Google Docs, you can use the Research Tool filter to help you.  You will learn more about these tools in your Google lessons.

Check out the questions and answers that you can find in the link below form Cyberbee:
Exploring Copyright