Weather Projects for Young Scientists: Experiments and Science Fair Ideas

Weather Projects for Young Scientists: Experiments and Science Fair Ideas — page 5
This photo taken by the space shuttle shows Earth's lower atmospheric layers lit by the setting sun The bottom layer is the troposphere and the top brighter layer is the stratos phere Layers of Air Scientists divide the atmosphere into four main lay ers See diagram on page 3 The layer closest to the ground is the troposphere It goes from the surface to about 7 miles 11 km up It has the most air and moisture of all the layers It's where most weather happens In this layer temperature decreases with height so higher altitudes are colder The stratos phere is from about 7 to 30 miles 11 to 48 km above the ground There is little mixing between the stratosphere and the troposphere so hardly any water vapor and dust make it into the stratosphere At the top of the stratosphere and into the mesos phere is the ozone layer the band of O3 Or