25-09-2013, 03:45 PM
Introduction to layers of Earth’s Atmosphere
Earth’s Atmosphere.pptx (Size: 3.6 MB / Downloads: 27)
Why is the atmosphere divided into 5 different layers?
The atmosphere is divided into five different layers because the atmosphere is not uniform, its properties change with altitude.
Two properties change with altitude, the AIR PRESSURE and the AIR TEMPERATURE
Lets look at each layer individually.
What is OZONE?
A gaseous layer in the upper atmosphere that protects the earth from harmful ultraviolet radiation. At lower levels, ozone becomes a major pollutant.
WHAT IS SMOG?
Pollution formed by the interaction of pollutants and sunlight (photochemical smog), usually restricting visibility, and occasionally hazardous to health.
MESOSPHERE
The Mesosphere goes from 50km to 90km.
In the mesosphere, the temperature drops with altitude.
The mesosphere is the coldest layer of the atmosphere.
Meteors burn up in this layer.
Radio waves are reflected back to earth in the mesosphere.