As a country prints more money the buying power of the money decreases because their is simply more of it. It's like apples, the more apples in a community the less valuable each individual apple becomes because they are less rare than the year before, same goes for the amount of money in a country. The more money in a country, the less valuable it is because it is no longer as rare.
in a process sometimes called sea-floor spreading, molten rock forces its way upwards through cracks along the valley.the molten rock cools, hardening into new oceanic crust.