Water Vapour
The compound that makes up most organisms is carbon. Yes, however, carbon is an element not a compound, water is a common compound in all living things.
Most of earth's atmosphere is in the lowest layer, the troposphere. Thus most of the gases are within 15 km of the Earth's surface.
Nitrogen is the substance that makes up most of earth's atmosphere making up 78% of the gases
Air is a mixture because it is easily separated into its component gases. If it was a compound you would have to perform complex operations like electrolysis to break the bonds between atoms in the compound...but with air, all you need do is cool the air enough to cause the gases to condense.
There are many gases in the atmosphere. The two most common gases found in the atmosphere however, are nitrogen and oxygen.
The compound that makes up most organisms is carbon. Yes, however, carbon is an element not a compound, water is a common compound in all living things.
Just about all of them! The noble gases are very rarely combined into compounds, but even some of them (most often Xe) can be combined to form a compound (the other noble gases, Ne, He, Ar, and Kr almost never react to form a compound though).
Water
carbon
Nitrogen makes up about 78% of the mostly homogeneous mixture of gases in Earth's atmosphere. Oxygen is almost 21% and other elements less than 1%.
compound
If you meant "compound" the answer is "H2O" or "water." If you meant "element" the answer is "hydrogen."
Most of earth's atmosphere is in the lowest layer, the troposphere. Thus most of the gases are within 15 km of the Earth's surface.
You can see some halogen gases, such as Chlorine and Bromine and Iodine because they are coloured. Most other gases are colourless and cannot be seen.
The Abundant gases are Nitrogen, Helium, and other gases in the Secondary Atmosphere.
Nitrogen is the substance that makes up most of earth's atmosphere making up 78% of the gases
True