Answer: This Q&A service is intended to help home gardeners with their gardening questions. We are not able to help in detail with science fair or individual school projects, although I did answer many questions for you earlier. However, this service is not intended to design experiments or demonstrations for you. I would strongly suggest you work with your teacher or adviser to research your topic in more detail, then consult with local authorities for answers to your more specific questions. They will be more familiar with your local conditions and materials. You might try the Agronomy or Botany department at the local university, for example.
To help start your research, you might try identifying your plant by its botanical name and use google. I believe you are growing a type of Vigna, possibly either V. radiata or V. mungo. In a quick search I am not able to find much information about growing this bean except as a sprouted seed crop intended for fresh eating or canning. Here are links to some information about it.
Best of luck with your project!
Q&A Library Searching Tips