When an El Niño kicks in. During an El Niño, the trade winds weaken in the central and western Pacific. Surface water temperatures off South America warm up, because there is less upwelling of the cold water from below to cool the surface.
Hello. You didn't show the map or say what kind of map the question is referring to, which makes it impossible for the question to be answered. However, I can help you by showing you what data you can see on different types of maps.
On physical maps you can see data on the relief of a region, data on the distribution of cities in a region and data on the existence of rivers, caves, mountains, forests and other elements that can compose that region.
On economic maps you can see data related to the economic activities of a region, data on the establishment and distribution of trade in a region and you can see statistical data on the economically active population in the region.
In demographic maps you can look at migration data, data about the spatial distribution of people in a region and you can analyze rates (illiteracy, birth, mortality, among others).
On political maps you can see data about the geographic borders of a country, or cities and states, data about the extension of territories, and data about political borders.
In historical maps you will be able to observe data about an event that was established during a period of time, data that portray the distribution of territories in a region and data of colonial advance in the continents.
Eons and Eras. The first principal subdivision is called the eon. An eon, the largest division of the geologic time scale, spans hundreds to thousands of millions of years. Geologists generally agree that there are two major eons: the Precambrian eon and the Phanerozoic eon.
