Copy and Paste

Hello! I am working on a project for a competition. I have to make a driving game. Now, this project is a team project and I have what I think may be a stupid question.

If I work on modeling the car for the game, and my friend models the world (streets, buildings, etc.) can we put my car inside his world? Copy from mine and paste to his? If not, it’s pointless to have each of us working seperately because the world and car are useless unless they can be combined. If this is possible, how does one do this? Thanks so much in advance.

Shift+F1 to append

Thanks so much for the quick reply. So, I think i get the Shift+F1 thing, but how do I paste into the other scene? Is it the same keystroke?