How can I add table from separate sheet as a dropdown in Project Form sheet?

Question

I have created a master material list for items needed for different projects. I have also created a form to create a document for each project being worked on. How can I link to two together so that in my project form, the materials list will show up in a dropdown where I can select the items needed and they would be entered in the form. I need to keep the master material list as a table so that new items can be added and show up in my dropdown.