Answer:
D. historical geology involves the study of rock strata, fossils, and geologic events, utilizing the geologic time scale as a reference; physical geology includes the study of how rocks form and of how erosion shapes the land surface
Explanation:
The geology can be separated into two sub-disciplines; physical geology and historical geology. The physical geology is the part of geology that has the present in its focus. It is examining the formation of the rocks, the volcanic eruptions, the earthquake activities, and even the effects of the pollution. On the other side, the historical geology is focused on the past. This part of the geology uses the geological time scale as its reference. It is examining the layers of the rocks, and through it tries to explain what happened in the past, how were the geological processes working. Also, the fossils are one of the main focuses because they provide lot of information about the environment in which they lived.
As the spacing between isobars increases, the horizontal pressure gradient force and wind speed decrease.
The closer the spacing of isobars, the stronger is the strain gra- dient force. The stronger the stress gradient pressure, the stronger is the wind. thus, intently spaced isobars mean strong winds; extensively spaced isobars imply lighter wind.
The relationship between isobar spacing and wind velocity is that the closer the isobar spacing then the stronger the wind velocity. The spacing among isobars represents a stress differential among those two isobars. when two isobars are nearer together then the stress changes at a greater rate over distance.
The lines around high and low strain on a climate map are called isobars, or lines of equal stress, as shown in the above image on the left. While isobars are near together it is very windy; while they are further aside, conditions are more calm. The wind around highs usually blows in a clockwise direction.
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All of the above are results
Overgrazing, which is when farmers allow livestock to graze to the point where they damage the vegetation, and deforestation, which is the process of removing trees and transforming a forest into cleared land, are also ways that humans cause desertification by removing vegetation.
