What Is Africa?
Africa is the world's second-largest continent by both area and population. It covers about 30.4 million km², making up roughly 20% of Earth's total land surface. With 54 countries, Africa has more nations than any other continent.
Key facts:
- Largest country (by area): Algeria
- Most populous country: Nigeria (over 220 million people)
- Longest river: the Nile (about 6,650 km)
- Highest mountain: Mount Kilimanjaro (5,895 m) in Tanzania
- Total population: over 1.4 billion people
Africa is the only continent that stretches from the northern temperate zone across the equator all the way to the southern temperate zone.
Physical Geography
Africa's landscape is incredibly varied. The continent has vast deserts, open grasslands, dense rainforests, and dramatic mountain ranges.
- Sahara Desert: The world's largest hot desert, covering about 9.2 million km² across northern Africa — roughly the size of the United States. Temperatures can exceed 50°C by day.
- Great Rift Valley: A huge crack in Earth's crust running 6,000 km through East Africa, creating deep lakes (such as Lake Tanganyika and Lake Victoria) and volcanoes.
- Congo Basin: Home to the world's second-largest tropical rainforest after the Amazon.
- Kalahari Desert: A large semi-arid desert in southern Africa, very different from the Sahara — it receives more rainfall and is covered with grass and shrubs.
The Nile River flows northward through northeastern Africa from the mountains of East Africa to the Mediterranean Sea. For thousands of years its annual floods deposited rich soil, allowing ancient Egyptian civilisation to flourish in the middle of a desert.
Victoria Falls, on the border of Zambia and Zimbabwe, is one of the world's most spectacular waterfalls. The Zambezi River plunges 108 metres over a cliff that is 1,708 metres wide — creating a mist cloud visible from 50 km away. Local people call it Mosi-oa-Tunya, meaning "The Smoke That Thunders."
Climate Zones
Because Africa straddles the equator, it has an exceptional range of climates from north to south.
- Desert climate (northern Sahara, Horn of Africa): Very little rainfall (under 25 mm per year), extreme heat by day.
- Semi-arid / Sahel: A dry band south of the Sahara — enough rain for sparse grass and scrub, but droughts are common.
- Tropical savanna: Large areas of sub-Saharan Africa. A hot wet season (heavy rains) and a long dry season. Supports the iconic African grasslands.
- Tropical rainforest: Around the Congo Basin near the equator. Hot and wet all year round, with over 2,000 mm of rain annually.
- Mediterranean climate: The northern coast (Morocco, Tunisia) and the southern tip (around Cape Town) both enjoy warm dry summers and mild wet winters.
Wildlife and Ecosystems
Africa is famous for its extraordinary variety of large animals. The Big Five — lion, African elephant, leopard, Cape buffalo, and rhinoceros — were historically named after the most challenging animals to hunt on foot. Today these animals are celebrated for wildlife tourism and conservation.
African savannas also support giraffes, zebras, wildebeest, cheetahs, hippos, and hundreds of bird species. The Congo rainforest is home to gorillas, chimpanzees, and okapis.
Africa contains many of the world's great wildlife reserves and national parks, including the Serengeti in Tanzania, the Masai Mara in Kenya, and Kruger National Park in South Africa. Every year, between 1.5 and 2 million wildebeest migrate across the Serengeti and Masai Mara in one of nature's greatest spectacles.
Africa's wildlife is threatened by habitat loss, poaching, and climate change. Many African countries rely on ecotourism — nature-based tourism — as a way of generating income while encouraging the protection of animals and wild spaces. A living elephant is worth far more to local communities over its lifetime than its tusks.
People and Countries
Africa is divided into five main regions:
| Region | Example Countries |
|---|---|
| North Africa | Egypt, Morocco, Algeria, Libya |
| West Africa | Nigeria, Ghana, Senegal, Côte d'Ivoire |
| East Africa | Kenya, Tanzania, Ethiopia, Uganda |
| Central Africa | DRC (Congo), Cameroon, Chad |
| Southern Africa | South Africa, Zambia, Zimbabwe, Mozambique |
Africa is the youngest continent by population — the median age is around 20 years, compared to 43 in Europe. Cities such as Lagos (Nigeria), Cairo (Egypt), and Kinshasa (DRC) are among the fastest-growing in the world. Africa has immense natural resources, including oil, diamonds, gold, and vast areas of fertile farmland.
Real world: The Great Wildebeest Migration — nature's largest land movement
Every year, between 1.5 and 2 million wildebeest, along with hundreds of thousands of zebras and gazelles, migrate in a clockwise circuit between Tanzania's Serengeti and Kenya's Masai Mara, following the rains in search of fresh grass. This is the world's largest overland animal migration. The most dramatic moment is the Mara River crossing, where thousands of wildebeest plunge into crocodile-filled waters. The migration drives massive ecotourism revenue for both Tanzania and Kenya — demonstrating how conserving African ecosystems has direct economic value for local communities.
Real world: The Nile — source of civilisation and modern geopolitics
The Nile is not just a geographical feature — it is the lifeblood of northeast Africa. Egypt has depended on its waters for 5,000 years; over 95% of Egyptians live within a few kilometres of the river. However, upstream countries, particularly Ethiopia, have been building major dams — including the Grand Ethiopian Renaissance Dam (GERD), which began filling in 2020. Egypt views any reduction in Nile flow as an existential threat. The dispute between Egypt, Sudan, and Ethiopia over the GERD is one of the most significant water-rights conflicts in the world — a modern example of how physical geography shapes international politics.
Real world: Rwanda — from conflict to conservation and tech hub
Rwanda in East Africa is often cited as a remarkable development story. In 1994, it was devastated by a genocide in which an estimated 800,000 people were killed in 100 days. Today, Rwanda has rebuilt: it has some of the lowest corruption rates in Africa, a growing tech economy in Kigali, and is a leader in conservation — it is home to the endangered mountain gorilla, and gorilla trekking permits (costing $1,500 each) generate millions in conservation funding. Rwanda banned plastic bags in 2008, long before most rich countries. It shows that geography is only one factor in a nation's destiny.
Where do you see Africa in real life? Africa connects to your daily life more than you might think. Your mobile phone contains cobalt and coltan from the DRC. Your morning coffee may come from Ethiopia or Uganda. Many cut flowers sold in European supermarkets are grown in Kenya. Understanding Africa's geography helps you understand where your everyday products come from — and the human and environmental costs of producing them.
Practice Problems
Name the world's largest hot desert and explain which continent it is found on.
Show answer
Explain why Africa has so many different climate zones compared to a continent like Europe.