In the story of creation, God took six days to do it and then rested on the seventh. So, six days for God would be six thousand years for us. The seventh day would be another thousand years to make seven thousand years total. The earth age we live in now is almost seven thousand years old. This is just some food for thought that we all should be getting ready for the day that Christ does return.
Lets go to one more place where it talks about the flood of the first earth age.
We all walked this earth in the first earth age when we were in our spiritual bodies. We walk on it now in our flesh bodies and those that go to heaven will be on this earth in their spiritual bodies once again. This earth will never go away and heaven will be on this earth after the great white throne judgment of God. We know that this is talking about the flood of the first earth age and not Noah's because in Noah's flood the waters did not hast away. In Genesis chapter 8 we read it took the water in Noah's flood months to dry up.