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.
Tropical climates are found in areas that lie close to the equator. Here the sun shines intensely. Within tropical climates, there are three groups: tropical wet; tropical wet and dry; and tropical monsoon.Tropical wet regions, also known as rain forests, have the most predictable weather on earth.ropical climates are found in areas that lie close to the equator. Here the sun shines intensely. Within tropical climates, there are three groups: tropical wet; tropical wet and dry; and tropical monsoon.