Geography of the Sahara and Rift Valley

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Questions and Answers

Which country is not part of the Sahara Desert's coverage?

  • Libya
  • Ethiopia (correct)
  • Mali
  • Sudan

What does the term 'Sahel' refer to in the context of the Sahara Desert?

  • A grassland area
  • A dense forest region
  • A transitional zone of savanna (correct)
  • A coastal area of the desert

Which of the following statements is true about the landscape of the Sahara Desert?

  • Sand dunes are the only type of terrain in the Sahara.
  • Regions of the Sahara have high annual rainfall.
  • The Sahara is primarily composed of coniferous forests.
  • The landscape includes both ergs and regs. (correct)

From which direction does the Sahel extend concerning the Sahara Desert?

<p>West to east (B)</p> Signup and view all the answers

What does the Arabic word 'sahil,' which relates to the term Sahel, mean?

<p>Shore (A)</p> Signup and view all the answers

What geographical feature is formed when land stretches and creates a rupture in the earth's crust?

<p>Graben (C)</p> Signup and view all the answers

Which statement about the Rift Valley System is accurate?

<p>It stretches from the Red Sea to Mozambique. (B)</p> Signup and view all the answers

What is the average width range of the Rift Valley System?

<p>32 km to 80 km (A)</p> Signup and view all the answers

Where are the Ethiopian Rift Valley lakes located?

<p>On the floor of the rift valley. (C)</p> Signup and view all the answers

Which lake is considered the largest in Africa?

<p>Lake Victoria (A)</p> Signup and view all the answers

What geological process divides the Ethiopian highlands?

<p>The Great Rift Valley (A)</p> Signup and view all the answers

What characterizes the lakes within the Rift Valley system?

<p>They include both freshwater and alkaline lakes. (D)</p> Signup and view all the answers

What is primarily affected by climate variability and change in Africa?

<p>Water resources (B)</p> Signup and view all the answers

How does climate change affect the supply of surface water in Africa?

<p>Causes shrinkage in supply (D)</p> Signup and view all the answers

What distinguishes climate variability from climate change?

<p>Variability can be due to natural and human processes (A)</p> Signup and view all the answers

Which of the following statements is true regarding Africa's climate vulnerabilities?

<p>Rainfall variability significantly impacts health and agriculture (A)</p> Signup and view all the answers

What does the discussion imply about anthropogenic climate change?

<p>It can inflict harm on vulnerable populations in Africa (C)</p> Signup and view all the answers

In which aspect is climate described as having a critical role according to the content?

<p>Fishing industry dynamics (D)</p> Signup and view all the answers

What is suggested about the implications of climate change on development policies in Africa?

<p>They need to incorporate climate variability for effectiveness (B)</p> Signup and view all the answers

What underlying concept is crucial for understanding climate impacts on health and conflicts?

<p>Natural and human dynamics interaction (A)</p> Signup and view all the answers

What phenomenon is Africa commonly described as experiencing?

<p>A climate-vulnerable continent (C)</p> Signup and view all the answers

What is one of the main impacts of climate change on sub-Saharan Africa's development policies?

<p>Pressure on agriculture, water supply, and health (C)</p> Signup and view all the answers

Which climatic region of Africa is characterized by the highest rainfall variability?

<p>Highland climatic region (D)</p> Signup and view all the answers

Which of the following is a key reason for Africa’s low adaptive capacities to climate change?

<p>Limited access to clean energy (A)</p> Signup and view all the answers

What effect does climate change have on Africa's ability to achieve the Millennium Development Goals?

<p>Reduces agricultural output (A)</p> Signup and view all the answers

Which factor does NOT significantly affect the climate of East Africa?

<p>Land use changes (C)</p> Signup and view all the answers

Which statement about Africa's climate is INCORRECT?

<p>Africa lies entirely in the tropics. (B)</p> Signup and view all the answers

How does climate change influence food security in sub-Saharan Africa?

<p>By causing unpredictable weather patterns (C)</p> Signup and view all the answers

Which of the following climatic classifications is NOT recognized among world climatic conditions?

<p>Temperate warm climates (C)</p> Signup and view all the answers

What is a significant outcome of climate change on health in sub-Saharan Africa?

<p>Increased prevalence of vector-borne diseases (C)</p> Signup and view all the answers

Flashcards

Sahara Desert

The largest hot desert on Earth, covering much of North Africa.

Erg

A vast, flat, sandy expanse within the Sahara desert.

Reg

A flat, rocky surface composed of pebbles and gravel, found in parts of the Sahara desert.

Sahel

A semi-arid transition zone, characterized by grasslands and savannahs, located south of the Sahara desert.

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Acacia

A type of vegetation common in the Sahel, known for its drought-resistant qualities.

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What is a Graben?

A deep valley formed when the Earth's crust is stretched and pulled apart by forces moving in opposite directions.

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What is a Rift Valley?

An elongated block of the Earth's crust that sinks downward between two faults, creating a rift valley.

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What are the East African Rift Valley Lakes?

A series of lakes located in the East African Rift Valley, stretching from Ethiopia in the north to Malawi in the south.

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Where is the Main Ethiopian Rift?

The northernmost part of the East African Rift Valley, located in Ethiopia, which splits the Ethiopian highlands into two halves.

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What is Lake Victoria?

The largest lake in Africa, located in a depression between the eastern and western rifts, not within the rift valley itself.

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What are the Ethiopian Highlands?

The high plateau in Ethiopia, characterized by a central highland complex of mountains, divided by the Great Rift Valley and surrounded by lowlands.

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What is the diversity of terrain in Ethiopia?

The diversity of terrain in Ethiopia, resulting in variations in climate, vegetation, soil, and settlement patterns.

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Climate Change

The natural and human-driven changes in a planet's climate over extended periods, usually decades or more.

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Climate Variability

The natural variations in a region's climate over shorter periods like seasons or years.

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Climate System

A set of interconnected parts that influence a planet's climate, such as the atmosphere, oceans, ice, and land.

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Development Policies

Policies designed to guide economic development and improve people's lives in a sustainable way.

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Climate Change Challenges to African Development Vision

The impact of climate change on a region's ability to prosper and achieve sustainable development.

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Climate Variability Challenges to African Development Vision

The impact of climate variability on a region's ability to prosper and achieve sustainable development.

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Vulnerability to Climate Change

A complex interplay of human-caused and natural factors that make people susceptible to the effects of climate change.

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Millennium Development Goals (MDGs)

A set of development goals adopted by the United Nations in 2000 to address poverty, hunger, disease, and other global challenges.

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Africa's Development Vision

The goal of achieving a prosperous and sustainable future for the people of Africa.

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Impact of Climate Change on SSA

Climate change is projected to significantly impact agriculture and food security in much of sub-Saharan Africa (SSA), leading to food shortages and potentially challenging the achievement of development goals like the Millennium Development Goals (MDGs) and Africa 2063.

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Sahel and Drought

The Sahel is a region in Africa that is especially vulnerable to drought because of its semi-arid climate. The region experiences frequent and prolonged periods of dryness.

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Tropical Desert Climate

Tropical desert climates are characterized by extremely high temperatures during the day, but these extreme temperatures are offset by relatively cool nights, causing a wide difference in daily temperatures.

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Climate's Influence on Human Activities

The influence of climate on human activities can be both beneficial and detrimental. For example, a favorable climate can boost agricultural production, but adverse conditions due to climate change can lead to crop failures and famine.

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Factors Affecting East Africa's Climate

The climate of East Africa is primarily shaped by factors such as latitude, altitude, ocean currents, and winds.

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Rainfall Variability in African Deserts

The desert climatic region of Africa is known for its extreme rainfall variability. The region can experience extended periods of drought as well as sudden, unpredictable heavy rainfall events.

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Africa's Tropical Climate

Africa is greatly influenced by tropical climates, with over two-thirds of its landmass situated within the tropics.

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Mediterranean Climate in Africa

The Mediterranean climatic region of Africa is characterized by mild, wet winters and hot, dry summers.

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Africa's Adaptive Capacity

Africa's ability to withstand the increasing pressures of climate change is limited due to its low adaptive capacity. Factors contributing to this low capacity include poverty, lack of infrastructure, and limited access to technology and resources.

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