An estimated 170,000 adults and children were infected at the end of 2004. Surveillance surveys conducted in 2001 and 2002 show higher rates of HIV in urban areas than in rural areas. Prevalence was highest in Conakry (5%) and in the cities of the Forest Guinea region (7%) bordering Cte dIvoire, Liberia, and Sierra Leone.
HIV is spread primarily through multiple-partner heterosexual intercourse. Men and women are at nearly equal risk for HIV, with young people aged 15 to 24 most vulnerable. Surveillance figures from 20012002 show high rates among commercial sex workers (42%), active military personnel (6.6%), truck drivers and bush taxi drivers (7.3%), miners (4.7%), and adults with tuberculosis (8.6%).
Several factors are fueling the HIV/AIDS epidemic in Guinea. They include unprotected sex, multiple sexual partners, illiteracy, endemic poverty, unstable borders, refugee migration, lack of civic responsibility, and scarce medical care and public services.
Guinea-Bissau is warm all year around and there is little temperature fluctuation; it averages 26.3 C (79.3 F). The average rainfall for Bissau is 2,024 millimetres (79.7 in) although this is almost entirely accounted for during the rainy season which falls between June and September/October. From December through April, the country experiences drought.
Football is the most popular sport in Guinea-Bissau. The Guinea-Bissau national football team is the national team of Guinea-Bissau and is controlled by the Football Federation of Guinea-Bissau. They are a member of the Confederation of African Football (CAF).
The majority of research in geology is associated with the study of rock, as rock provides the primary record of the majority of the geologic history of the Earth. There are three major types of rock: igneous, sedimentary, and metamorphic. The rock cycle is an important concept in geology which illustrates the relationships between these three types of rock, and magma. When a rock crystallizes from melt (magma and/or lava), it is an igneous rock. Igneous rock can be weathered and eroded, and then redeposited and lithified into a sedimentary rock, or be turned into a metamorphic rock due to heat and pressure that change the mineral content of the rock which gives it a characteristic fabric. The sedimentary rock can then be subsequently turned into a metamorphic rock due to heat and pressure and is then weathered, eroded, deposited, and lithified, ultimately becoming a sedimentary rock. Sedimentary rock may also be re-eroded and redeposited, and metamorphic rock may also undergo additional metamorphism. All three types of rocks may be re-melted; when this happens, a new magma is formed, from which an igneous rock may once again crystallize.
To study these three types of rocks, geologists evaluate the minerals that make up the rock. All the colors you see in rocks are the different minerals crystallized within. Each mineral has distinct physical properties and there are multiple tests that a geologist can do to determine each one. The Mineral Identification tests are:
Luster: Measurement of the amount of light reflected from the surface. Luster is broken up into Metallic and Non-metallic.
Color: Minerals are grouped by their color. Mostly diagnostic but impurities can change a minerals color.
Streak: Performed by taking a porcelain plate and scratching the mineral on it. The color of the streak can help you name the mineral.
Hardness: The resistance of a mineral to scratch.
Breakage Pattern: A mineral can either show fracture or cleavage. Fracture being breakage of uneven surfaces and cleavage being breakage along closely spaced parallel planes.
Specific Gravity: the weight of a specific volume of a mineral.
Effervescence: Involves dripping HCL on a mineral to test for fizzing.
Magnetism: Involves using a magnet to test for magnetism.
Taste: Minerals can have a distinctive taste like Halite (tastes like salt).
Smell: Minerals can have a distinctive odor. For example, sulfur smells like rotten eggs.