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.
Amazon Rainforest Climate... The Amazon rainforest climate is typically a tropical climate, also known as equatorial climate, found approximately 12 degrees to the North and South of the equator. Like any other tropical rainforest, it's hot and humid throughout the year, with an average annual temperature of 27 C (80.7 F).