What is the tropopause, and how does the composition of the atmosphere change across it?

... atmosphere from the soil, volcanic vents, fumaroles, and hydrothermal systems. By far the most abundant volcanic gas is water vapor, which is harmless. The two most abundant gases in the atmosphere are nitrogen (N2) and oxygen (O2). Nitrogen makes up approximately 78% of the atmosphere, while oxygen accounts ... Greenhouse gases are those that can trap heat in the atmosphere, thus contributing to the greenhouse effect. Common greenhouse gases include carbon dioxide (CO₂) ... Mar 1, 2018 ... This gas is a chemical element with the symbol Ar and the atomic number 18, and it's the third-most abundant gas in the atmosphere (and the most ... ... atmosphere. Carbon is the fourth most abundant element in the universe. With its ability to form complex molecules such as DNA and proteins, carbon makes ... Feb 4, 2025 ... Answer (Detailed Solution Below) ... Option 2 : Nitrogen ... Crack DGP TGT English with India's Super Teachers ... FREE. Demo Classes Available ... The most abundant gas in Earth's atmosphere is NITROGEN, followed by OXYGEN, which is needed to burn wood and fuel. The third-most abundant gas is ARGON. Nitrogen makes up approximately 78% of the Earth's atmosphere, making it the most abundant gas. This is primarily due to the fact that nitrogen is released in ... The four most abundant gases in air are N2, O2, Ar, and CO2. In a sample of air at STP, the molecules have the largest root-mean-squared speed, µrms, the. Nov 15, 2023 ... The abundance of heat-trapping greenhouse gases in the atmosphere ... Carbon dioxide is the single most important greenhouse gas in the atmosphere ...