


Around 80% of the mass of the atmosphere is in the troposphere. This is where we live and even where planes fly.

Unlike the troposphere the stratosphere gets its heat by the Ozone Layer absorbing radiation from the sun. Stratosphere - The stratosphere extends for the next 32 miles after the troposphere.

The coldest place on Earth is at the top of the mesosphere. This is where most meteors burn up upon entry. Mesosphere - The mesosphere covers the next 50 miles beyond the stratosphere.Temperatures can get extremely hot in the thermosphere. Thermosphere - The thermosphere is next and the air is very thin here.It goes all the way to 10,000 km above the Earth's surface. Exosphere - The last layer and the thinnest.The Earth's atmosphere is divided up into 5 major layers: Oxygen is needed by animals to breathe and carbon dioxide is used by plant in photosynthesis. These include argon, carbon dioxide, neon, helium, hydrogen, and more. There are lots of other gases that are part of the atmosphere, but in much smaller amounts. The atmosphere is made up of mostly nitrogen (78%) and oxygen (21%). The atmosphere is the air that plants and animals breathe to survive. All of these things are important to life and the Earth's ecology. The weather keeps too much hot air from forming in one place and causes storms and rainfall. This big blanket also helps to form our weather patterns and climate. The ozone layer helps to protect the earth from the Sun's radiation. There is also a portion of the atmosphere called the ozone layer. So we don't get too cold at night and too hot during the day. It also keeps the overall temperature of the Earth fairly steady, especially between night and day. It absorbs the heat from the Sun and keeps the heat inside the atmosphere helping the Earth to stay warm, called the Greenhouse Effect. The atmosphere protects Earth like a big blanket of insulation. The atmosphere is very important to life on Earth and does many things to help protect life and help life to survive. The earth is surrounded by a layer of gases called the atmosphere.
