How To Write Science Paper Introduction . The first few sentences should act as an indication of a. • presents nature and scope of the. Introduction scientific paper from pgbari.x.fc2.com By the end of your introduction the reader must know what you are trying to achieve by writing the paper. You can start your introduction with a few sentences which announce the topic of your paper and give an indication of the kind of research questions you will be asking. In each paragraph, the first sentence defines the context, the body contains the new idea and the final sentence offers a conclusion.