The atmosphere layer closest to the earth is referred to as the troposphere. Beyond the troposphere are the stratosphere, the ozone layer, the mesosphere, and the thermosphere. The atmosphere is made up of 78% nitrogen, 21% oxygen, and smaller amounts of argon, carbon dioxide, helium, and neon. Learn about the five layers of Earth's atmosphere, their characteristics, and their significance for life and climate. Find out how the atmosphere protects, regulates, and transports water and energy on the planet. Learning Objectives Meaning of Composition of Atmosphere Composition of Atmosphere Nitrogen Oxygen Argon Carbon dioxide Methane Ozone Water Vapour Dust Particles Aerosols Meaning of Structure of Atmosphere Structure of Atmosphere Homosphere Troposphere Stratosphere Mesosphere Heterosphere Thermosphere Exosphere Importance of the Atmosphere Summary and Conclusions Introduction The atmosphere of the earth is a vast expanse of gases enveloping our entire earth. Within this envelope, we are ... How many layers of atmosphere are there? The Earth’s atmosphere can be divided into five main layers: the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
