THE TROPOSPHERE -
A turbulent layer of gases extending up to 12km.
Where the weather is.
Pressure & temperature decrease with altitude.
Warmed by infra-red radiation from the Earth's surface, carried upwards by convection currents.
O2 in the troposphere.
THE STRATOSPHERE -
Extends from about 12km to 50km above the Earths surface.
No 'weather' - always calm and sunny.
Planes fly in the lower stratosphere.
Ozone becomes more concentrated, known as the ozone layer.
Heated from above by solar radiation.
Pressure decreases with altitude.
THE OZONE LAYER -
Ozone is O3, a tri-atomic molecule of oxygen.
UV light is reflected off sand and snow.
Ozone is poisonous, so it is a…