The atmosphere and oceans are so small in comparison to the overall earth it is comparable to a film of water on a billiard ball. Even all the mighty oceans only make up 1/4000 of the earth's total mass. The scale height of the atmosphere is about 8.5 km. Whereas the radius of the earth is 6,371.0km in other words the earth is more than 1000 times bigger than the atmosphere. The third rock from the sun contains around it a thin layer of water, gases and vapour at a temperature of between 89°C to 57.7 °C (mean = 14°C). Within this exists all of the known life in the universe and all that most of us holds dear.