wikipedia.com
medievaltimesca.blogspot.com
google.com
about.com
Tuesday, April 1, 2008
Monday, March 31, 2008
African Technology & Change
Over time new discoveries changed West African culture. The most imporant discovery
happened around 500 BC when West Africans learned how to make tools out of iron. The first
people to use this technology were the Nok people. The Nok lived in modern-day Nigeria. They
used iron to make better farm tools to grow more food. With iron tools, people could cut down
trees and make more land useable for farming. They also used iron to make stronger weapons.
With more resources, the people had surpluses that they could trade.
Saturday, March 29, 2008
Geography
Climate and health
Vegetation in February and August
Lying almost entirely within the tropics, and equally to north and south of the equator, Africa does not show excessive variations of temperature.
Great heat is experienced in the lower plains and desert regions of North Africa, removed by the great width of the continent from the influence of the ocean, and here, too, the contrast between day and night, and between summer and winter, is greatest. (The rarity of the air and the great radiation during the night cause the temperature in the Sahara to fall occasionally to freezing point.)
Farther south, the heat is to some extent modified by the moisture brought from the ocean, and by the greater elevation of a large part of the surface, especially in East Africa, where the range of temperature is wider than in the Congo basin or on the Guinea coast.
In the extreme north and south the climate is a warm temperate one, the northern countries being on the whole hotter and drier than those in the southern zone; the south of the continent being narrower than the north, the influence of the surrounding ocean is more felt.
The most important climatic differences are due to variations in the amount of rainfall. The wide heated plains of the Sahara, and in a lesser degree the corresponding zone of the Kalahari in the south, have an exceedingly scanty rainfall, the winds which blow over them from the ocean losing part of their moisture as they pass over the outer highlands, and becoming constantly drier owing to the heating effects of the burning soil of the interior; while the scarcity of mountain ranges in the more central parts likewise tends to prevent condensation. In the inter-tropical zone of summer precipitation, the rainfall is greatest when the sun is vertical or soon after. It is therefore greatest of all near the equator, where the sun is twice vertical, and less in the direction of both tropics.
Vegetation in February and August
Lying almost entirely within the tropics, and equally to north and south of the equator, Africa does not show excessive variations of temperature.
Great heat is experienced in the lower plains and desert regions of North Africa, removed by the great width of the continent from the influence of the ocean, and here, too, the contrast between day and night, and between summer and winter, is greatest. (The rarity of the air and the great radiation during the night cause the temperature in the Sahara to fall occasionally to freezing point.)
Farther south, the heat is to some extent modified by the moisture brought from the ocean, and by the greater elevation of a large part of the surface, especially in East Africa, where the range of temperature is wider than in the Congo basin or on the Guinea coast.
In the extreme north and south the climate is a warm temperate one, the northern countries being on the whole hotter and drier than those in the southern zone; the south of the continent being narrower than the north, the influence of the surrounding ocean is more felt.
The most important climatic differences are due to variations in the amount of rainfall. The wide heated plains of the Sahara, and in a lesser degree the corresponding zone of the Kalahari in the south, have an exceedingly scanty rainfall, the winds which blow over them from the ocean losing part of their moisture as they pass over the outer highlands, and becoming constantly drier owing to the heating effects of the burning soil of the interior; while the scarcity of mountain ranges in the more central parts likewise tends to prevent condensation. In the inter-tropical zone of summer precipitation, the rainfall is greatest when the sun is vertical or soon after. It is therefore greatest of all near the equator, where the sun is twice vertical, and less in the direction of both tropics.
Thursday, March 20, 2008
Guiding Principles
Vision means seeing what could be and what will be and living the difference.
There is no such thing as too much truth.
How you say it is as important as what you say.
When identifying problems, offer strategies and solutions.
Everyone’s time is valuable.
Your commitment is to make others around you successful.
Our growth together requires us to grow individually.
Integrity is everything.
Tuesday, March 18, 2008
My Timeline
8000B.C. Ancestors oof the West Africans appear in Niger River area
2750B.C. During the old and middle stne ages, West Africans gather food, hunt, fish, and dig for roots in what is called the Sahel
2000B.C. The Joliba and Quorra join to form the Niger River
500B.C. Iron in general use in West Africa
200A.D. About 1 million people lived in Sahel
2750B.C. During the old and middle stne ages, West Africans gather food, hunt, fish, and dig for roots in what is called the Sahel
2000B.C. The Joliba and Quorra join to form the Niger River
500B.C. Iron in general use in West Africa
200A.D. About 1 million people lived in Sahel
Subscribe to:
Posts (Atom)
