It is the second-smallest county by total area in Maryland. Notable waterways include the Choptank River and Tuckahoe Creek, as well as the man-made Williston Lake. Caroline County currently ranks seventh nationally in terms of land protected under the Ag Preservation Program.
Dry air contains roughly (by volume): All the above are relatively small, light, non-polar molecules, characteristics mimicking an ideal gas. At normal ambient conditions such as standard temperature and pressure, most real gases behave qualitatively like an ideal gas.
The pie chart shows the proportions of the main gases in the atmosphere. The composition of air. The two main gases are both elements and account for about 99 percent of the gases in the atmosphere. They are: 1  about 4 / 5 or 80 percent nitrogen (a relatively unreactive gas).2  about 1 / 5 or 20 percent oxygen (the gas that allows animals and plants to respire and for fuels to burn).he two main gases are both elements and account for about 99 percent of the gases in the atmosphere. They are: 1  about 4 / 5 or 80 percent nitrogen (a relatively unreactive gas).