(a) How are the boundaries between the regions of the atmosphere determined?

Video transcript

Hi everyone for this problem. We're being asked to identify which statement is false and for this we are comparing atmospheric pressure and elevation or altitude. So let's go ahead and draw a graph of what that looks like in terms of both variables. So we're going to put altitude on our Y axis and pressure on our X axis. Okay, So what happens here is as altitude decreases, our pressure is going to increase. Okay, so let's keep that in mind as we look at these questions. So for statement, a atmospheric pressure decreases with increasing elevation. This is going to be true. Okay, For statement be the troposphere and stratosphere together account for 99.9% of the mass of the atmosphere. This is going to be true. This is why pressure is higher at lower elevation. So this is true. Statement three. Atmospheric temperature decreases with increasing elevation. This is false. It fluctuates depending on the layer and statement for the layers of the atmosphere are based on elevation. This is false. It is based on the temperature profile. So are false statements for this question. Are going to be statement number three and statement number four, That is the end of this problem. I hope this is helpful