4: Where wast thou when I laid the foundations of the earth? declare, if thou hast understanding.
God answers Job with a series of rhetorical questions still relevant today (chapters 38-41). Thus showing Job his lack of understanding and the folly of trying to make sense of things when he was not there to witness them.
Today we try and make sense of the things we see and the things we learn from science, however, God was the only one present when he laid the foundations of the earth. Therefore, we must start with the the details found in the Bible and then learn from science within this context. When we start with a scientific view and then try to fit the Bible around it this verse reminds us that we were not there, we do not know all the details apart from what God has graciously left for us in his Word.