How does the pressure and temperature of each air mass cause changes?

Why is the sun hot and can burn you if you get to close

Why is it important that each contour line represents the same amount of gain or loss in elevation

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?