The following can result from plagiarism:
Most penalties are determined by the professor and the academic guidelines laid out by the departments and colleges. Check with your individual instructors and read the syllabus to learn about the specific penalties of each class.
Self-plagiarism is possible and it's just as serious.
Self-plagiarism, or "double-dipping," is deception and goes against the core principles of ethical writing. Papers are assigned for you to demonstrate what you have learned in a particular class. If you reuse a paper you wrote for a previous class, you are not demonstrating new learning.
Examples of self-plagiarism: