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.
The climate is most commonly found in Southeast Asia, Central Africa and South America. However, tropical microclimates are found in many other regions (e.g. far North Queensland), while not everywhere along the equatorial region features a tropical rainforest climate.escription [edit]. Tropical rainforests have a type of tropical climate in which there is no dry season â all months have an average precipitation value of at least 60 mm. Tropical rainforests have no summer or winter; it is typically hot and wet throughout the year and rainfall is both heavy and frequent.