When writing a research paper, why is it useful to create source cards?

It's easier to keep track of your research that way, more organized

Becaus... they will help you to:

identify the sources of quotations and ideas for citing your sources later (giving credit to your sources).

find sources again if you need them.

make your works cited (a list of the sources from which you used borrowed material in your project).

I hope this helped! :*