Exam 20: An Envelope of Gas: Earths Atmosphere and Climate

Lightning results from ________.

As an air mass rises,it generally experiences ________.

Starting from the equator and moving toward either pole,how many rows of global convection cells are present within the troposphere?

Which layer of the atmosphere is chemically stratified,with the lightest molecules riding above heavier molecules?

The long-term buildup of oxygen in Earth's atmosphere is a result of ________.

Which layer in the figure below can be thought of as the weather layer?

The boundary between two bodies of air with differing characteristics (such as temperature,pressure,and relative humidity)is termed a ________.

Compared with warm fronts,cold fronts move ________.

At zones of divergence and convergence,such as at the equator,the poles,the horse latitudes,and polar fronts,surface winds are generally ________.

In the figure below,the pressure gradient is the greatest between point ________ and point ________.