About 78 percent of the Earth's atmosphere consists of nitrogen, and oxygen makes up 21 percent. The remaining 1 percent is a combination of argon, water, carbon dioxide and other gases. The Earth's atmosphere is the onl... More »

Earth's atmosphere, which is around 300 miles thick, is mainly made of nitrogen and oxygen, although there are many other trace substances in its composition. Trace substances make up only 1 percent of the bulk of the at... More »

According to the University of Michigan, the primitive Earth did not have an atmosphere until gases were released from the planet's interior. Fast-moving gases and massive volcanic eruptions led to the creation of two di... More »

The most abundant gas in the Earth's atmosphere is nitrogen. Nitrogen makes up 78 percent of the Earth's atmosphere, and it is a permanent gas, which means that its percentage does not change on a daily basis. The rest o... More »

The Earth's atmosphere is primarily made up of nitrogen, oxygen and argon, but it includes trace gases in smaller amounts such as neon, helium, carbon dioxide, methane, nitrous oxide and ozone. The most abundant gases in... More »

The two main gases found in Earth's atmosphere are nitrogen and oxygen. Nitrogen makes up 78 percent of the atmosphere, and oxygen makes up 21 percent. The remaining 1 percent consists of other gases, such as argon and w... More »

The two most abundant gases in the Earth’s atmosphere are nitrogen and oxygen. The atmosphere contains approximately 78 percent nitrogen and about 21 percent oxygen. The Earth’s atmosphere also contains lesser amounts of... More »