Layers of the Earth's Atmosphere

Guide Questions:

1. What layer of the Earth’s atmosphere does most weather occur?

2. Where can we find the Protective Ozone?

The atmosphere is a blanket of air that protects the Earth from ultraviolet radiation and meteors.
It primarily consists of 78% nitrogen and 21% oxygen gases. The remaining 1% contains several inactive gases - argon, neon, helium, hydrogen, and xenon - and other several gases that vary in concentration - water vapor, carbon dioxide, methane, nitrous oxide, ozone, and chlorofluorocarbons.

Earth's atmosphere has a series of layers. Moving upward from the ground level, we have the:

It is the lowest region of the Earth's atmosphere.
It is where we live and most weather occurs.
It is where the Ground-level ozone is found. It is considered “bad” ozone because it is an air pollutant that damages human health, vegetation, and many common materials.

It is the only layer where jets can travel.
It is where the Protective Ozone is found. It is considered “good” ozone because it protects life on Earth from the harmful effects of the Sun's Ultraviolet (UV) rays.

It is the coldest region of the atmosphere.
It extends from the top of the stratosphere to an altitude of about 90 kilometers.
It is the layer that protects the Earth by burning up meteors while entering the atmosphere.

Its air molecules are 1 km apart.
It is the first layer exposed to the Sun’s radiation and so it is first heated by the Sun.
It is often considered the “hot layer” because it contains the warmest temperatures in the atmosphere.
It is the layer where satellites are found.
It is where the Ionosphere is found.

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