The Handbook of Student Rights and Responsibilities outlines Rensselaer's policies on Academic Integrity and Plagiarism. Among the types of academic dishonesty is plagiarism.
"Plagiarism is defined as representing the work or words of another as one's own through the omission of acknowledgment or reference. Examples include using sentences verbatim from a published source in a term paper without appropriate referencing, or presenting as one's own the detailed argument of a published source, or presenting as one's own electronically or digitally enhanced graphic representations from any form of media."
Be sure you are giving proper attribution to your sources. See the Citations section of this site for guides to formatting and citing sources.
Plagiarism.org is a useful site for information about types of plagiarism, tips on how to avoid plagiarizing material, and how to use various writing and citation resources.