Layers of the Atmosphere

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Presentation transcript:

Layers of the Atmosphere

Layers The four main layers are called the troposphere, the stratosphere, the mesosphere, and the thermosphere The four main layers are classified according to temperature

The Troposphere The lowest layer of the Earth’s atmosphere (where we live) Where the Earth’s weather occurs 0-12 km in the atmosphere About 1 km = 6.5 Celsius degrees cooler At the tops of the troposhere it is about -60 degrees Celcius (-76 ⁰F)

The Stratosphere 12-50 km in atmosphere Upper stratosphere is warmer than lower stratosphere because it contains a layer of ozone Ozone absorbs energy from sun and converts to heat

The Mesosphere 50-80 km in atmosphere As altitude increase, temperature decreases (upper mesosphere is -90 ⁰C or -130⁰F) This is where you see shooting stars (mesosphere protects Earth from being hit) Little change to environment

The Thermosphere No define outer limit- runs into outer space As altitude increases, temperature increases to 1800 degrees Celsius (3272 ⁰F) Why is the thermosphere so hot? Energy coming from sun strikes thermosphere first. Little change to environment