TWO IMPORTANT RULES FOR SCIENCE WRITING:
1. No personal pronouns! (I, me, we, you, us, they, them, etc…)
2. No direct quotes, you MUST paraphrase!
The purpose of the informal introduction is to give the reader background info on the motivation and science content of your experiment.
Here, you should look to include statistics and facts from reputable websites (.edu, .gov, some .org) that help to put your study in context.