hmmmm
I think all these posts haven't really answer the question... and a lot of the site will only talk about what the project is but it is the impact on society where the mark is given~~ so be careful
we did similar question in class as a practice, where we treat it as an 8 mark question... the following points will hopefully get u started:
1. talk about the project, what's its purpose (remember its not simply a reserach, its a race with time, with the germans)
2. some scientists involved and their contribution (e.g. Einstein and Fermi)
3. than the impacts (e.g. expense of the project - millions of money could have been spent in other humanity areas; health risk, people of heroshima and nagasaki; the ending of WWII; new phase of weaponary armament, nuclear war head defines who's the superpower... cold war... etc etc)
hope this help a bit~~