A Geographical and Historical Sketch of Africa

These flashcards cover the primary geographic features, major ecosystems, and historical African societies and their adaptations to climate change as described in the lecture notes.

Nile River

The longest river in the world, flowing northward for about $6,650\,km$ ($4,130\,miles$) through eleven African countries before emptying into the Mediterranean Sea.

Sahara Desert

The largest hot desert in the world, stretching across North Africa and consisting of dunes, rocky plateaus, and oases.

Ethiopian Highlands

Also known as the Ethiopian Plateau, this is a vast mountainous region in the Horn of Africa characterized by steep cliffs and deep valleys.

Great Rift Valley

A geographic feature spanning $6,000\,km$ from the Middle East to East Africa, created by tectonic plate movements and containing unique trenches and lakes.

Inundation

The annual flooding of the Nile River which deposited nutrient-rich silt onto farmlands, essential for the growth of crops like wheat and barley in Ancient Egypt.

Escarpments

Long steep slopes located at the edge of a plateau, such as those found around the Great Rift Valley.

Kalahari Desert

A vast semi-arid sandy savanna stretching across Botswana, Namibia, and South Africa, which receives enough rainfall to support more vegetation than typical deserts.

San People

Also known as the Bushmen, they are a group that has lived in the Kalahari for thousands of years by practicing hunting and gathering.

Mount Kilimanjaro

The tallest mountain in Africa, standing at $5,895\,meters$ ($19,341\,feet$) above sea level, featuring three volcanic cones: Kibo, Mawenzi, and Shira.

Savannas

Grassy plains with scattered trees and shrubs that support diverse wildlife and experience distinct wet and dry seasons.

Rainforests

Densely vegetated ecosystems like the Congo Basin that act as nature's metropolises, regulating the Earth's climate and producing oxygen.

Mangroves

Coastal ecosystems made up of trees with stilt-like roots that can grow in salty water and protect the coastline from erosion.

Wetlands

Biodiverse areas where water covers the soil permanently or seasonally, acting as natural water filters.

Swahili Coast

A coastal region that served as a vital link connecting Africa to the Indian Ocean Trade, including cities like Kilwa.

Nok Culture

An early Iron Age society in West Africa (circa $1000\,BC$ to $300\,AD$) renowned for their terracotta sculptures and sophisticated iron smelting.

Desertification

The expansion of desert areas and loss of fertile land, historically caused by overgrazing, deforestation, and climate change in the Sahel regions.

Ghana Empire

An empire (circa $300$ to $1100\,CE$) located in modern-day Mauritania and Mali that prospered by controlling trade routes for gold and salt.

Great Zimbabwe

A civilization ($1100$ to $1450\,AD$) whose economy relied on agriculture, cattle herding, and trade in gold and ivory with Swahili city-states.

Hapi

The Ancient Egyptian god of the inundation, personifying the significance of the Nile's flooding to Egyptian life.

Oases

Fertile areas within a desert where water is available, supporting plants, animals, and human trade routes.