From the YouTube Video Project Based Learning For Teachers, it says that "Project Based Learning has students working over extended periods of time answering a driving question". This question has to be answered by research and obtaining an end result to share with their peers. This video is a great resource to understand how Common Core Standards and Project Based Learning coincide with each other.
In the video Two Students Solve The Ketchup Problem, you find out that the students are trying to solve the issue of water coming out of the ketchup bottle. This was their driving question, and a great resource for learning how to form and solve a driving question is The Driving Question or Wing Project: Crafting a Driving Question.