If the poreis completely closed to the surface, the result is a whitehead. If the pore is wide open, oil becomes oxidized (that is, acted on by oxygen in the air), the oil changes from white to black, and the result is a blackhead. This is how the two types of comedones develop. Comedo is the Latin word for glutton.
The Amazon rainforest topical climate. Tropical climate refers to zones in a range of latitudes between 5/10 to 35. The temperatures remain high all over the year and shows an annual wide change in precipitations with wet and dry seasons: The dry season duration is proportional to the latitude to ultimatly become a mostly dry area.
A tropical climate is a climate typically found within the Tropics, while a few locations outside the Tropics are considered to have a tropical climate.In the Koeppen kÃ¶ppen climate classification it is a-non arid climate in which all twelve months have mean temperatures of at least Â°18 (c Â°64). f Tropical rainforest climate (Af): All twelve months have average precipitation of at least 60 mm (2.4 in). 2  These climates usually occur within 5â10Â° latitude of the equator. 3  In some eastern-coast areas, they may extend to as much as 25Â° away from the equator.