GEOGRAPHY GRADE 10

Crust (Earth)

The outermost layer of the Earth’s surface

Mantle (magma, Lava)

The layer beneath the Earth’s crust where magma and lava are found

Core (molten rock)

The innermost layer of the earth consisting of molten rock

Tectonic plates

Large sections of the Earth’s solid and outer part that move and interact with each other.

Subduction

Are zones where tectonics dive against each other.

Main and Minor plates

• Main

  • African plate

  • North American plate

  • South American plate 

  • Pacific plate

  • Antarctic plate

• Minor

  • Caribbean plate

  • Iranian plate

  • Arabian plate

  • Indian plate

  • Somali plate

Coastal erosion

This is the wearing away or removal of coastal landforms due to natural processes and human activities. Examples include cliffs, beaches and dunes

Causes

• Natural processes

  • Waves

  • Tides

  • Rainfall

  • Currents

• Human activities

  • Coastal development

  • Mining

  • Pollution

Volcanoes

These are landforms created by the eruption of magma from the earth’s interior.

Types

• Shield volcanoes - Slowly erupting

• Stratovolcanoes - Steep sided and explosive

• Cinder cones - small and gently sloping

Risks caused by volcanoes

• Widespread destruction

• Displacement

• Gas emissions since they release poisonous gases that can cause respiratory diseases

• Loss of life

Landforms created

• volcanic plug

• crater lake

• Caldera

• Lava dammed lakes

Hurricanes

• Tropical cyclones formed over warm ocean waters

• They are characterized by strong winds, heavy rainfall and storm surges(rise in sea level)

Effects and risks

• Storm surge: A rise in sea level due to the storm, causing coastal flooding and damage.

• Flooding: Heavy rainfall and storm surges can cause widespread flooding.

• Strong winds: Hurricanes can knock down trees, power lines, and buildings.

• Tornadoes: Hurricanes can produce tornadoes, especially in the outer rain bands.

• Power outages: Strong winds and flooding can cause widespread power outages.

What to do incase of hurricanes

• Stay informed: Monitor local news and weather reports for updates.

• Evacuate if necessary: Follow evacuation orders and instructions from authorities.

• Take shelter: Go to your designated shelter or safe location.

• Stay safe during the storm: Avoid flooded areas, stay away from power lines, and avoid traveling during the storm.

Rivers

• Natural watercourses that flow into an ocean, sea, lake or another river

• Classified based on - the shape, size and flow characteristics

Advantages and Disadvantages

• Advantages

  • Source of food

  • Source of water for transport, irrigation and drinking

• Disadvantages

  • Pollution(Can affect ecosystem)

  • Flooding

  • Erosion

Infiltration

• When water passes into soil or porous rock.

• Helps to recharge groundwater aquifers and reduce runoff.

River shape

• Refers to the form of a rivers bed and banks. It can be meandering, straight, braided or even in a loop pattern

• The shape can be influenced by various factors such as geological composition, tectonic activity and climate

River transport

• Refers to the movement of sediment or objects by water flow.

• It plays a crucial role in transporting sediment, nutrients, and pollutants across the landscape.

Earthquakes

This is the shift of tectonic plates under the earth’s surface that cause a sudden release of energy

Causes

• Vibrations within their underground(natural)

• Mining( natural and human )

• Oil drilling

• Nuclear testing

• Construction of large dams

Effects

• Positive

  • Create new landforms

  • They can bring minerals closer to the earth’s surface

  • Renewal of ecosystems

• Negative

  • Destruction of habitats

  • Pollution

  • Floods since they trigger tsunamis.

Convergent boundary

• Plate boundary where plates move towards each other, leading to subduction or collision.

• Examples

  • Andean mountain range: The Nazca Plate is being subducted beneath the South American Plate, resulting in the formation of the Andean mountain range.

  • Himalayan mountain range: The Indian Plate is being pushed beneath the Eurasian Plate, resulting in the formation of the Himalayan mountain range.

  • Japanese island arc: The Pacific Plate is being subducted beneath the North American Plate, resulting in the formation of Japan's island arc

Classifications

• Continental-continental convergence: Two continental plates are colliding, such as the collision between the Indian and Eurasian Plates.

• Oceanic-oceanic convergence: Two oceanic plates are colliding, such as the collision between the Pacific and Nazca Plates.

• Continental-oceanic convergence: A continental plate is colliding with an oceanic plate, such as the collision between the North American Plate and the Pacific Plate.

Divergent boundary

• Plate boundary where plates move apart, creating new crust.

• Examples

  • Mid-Atlantic Ridge: The North American and Eurasian Plates are moving apart, creating new oceanic crust as magma rises to the surface.

  • East African Rift System: The African Plate is splitting in two, creating a rift valley and eventually a new ocean.

  • Red Sea Rift: The African and Arabian Plates are moving apart, creating a new oceanic crust.

Transform boundary

• Plate boundary where plates slide past each other horizontally.

• Examples

  • an Andreas Fault: The Pacific Plate is sliding past the North American Plate, creating a transform boundary.

  • North Anatolian Fault: The Arabian Plate is sliding past the Eurasian Plate, creating a transform boundary.

  • South American- Antarctic Plate boundary: The South American Plate is sliding past the Antarctic Plate, creating a transform boundary.

Industrialization

Concentration of different types of industries in a given area, zone or region

Factors that determine and benefits

• factors that determine the location of industries and industrial zones

  • Proximity to raw materials

  • Access to transportation networks

  • Labor availability and costs

  • Market proximity

• The benefits of industrialization

  • Industrialization creates jobs

  • Improved living standards

  • Infrastructure development

  • Technological advancement

Global warming

Gradual increase in Earth's surface temperature due to greenhouse gas emissions.

the environmental risks of industrialization and solutions to curb the problem.

• pollution 

• deforestation, 

• habitat destruction

• increased greenhouse gas emissions leading to climate change.

• Solutions

  • Suggest ways that industries to run on renewable resource, instead of fossil fuels to reduce greenhouse gas emissions

  • Governments should invest in research and development of new sustainable technologies.

  • Industries should reduce plastic.

Global warming

• Causes

  • Greenhouse Effect: Trapping of heat by gasses like carbon dioxide (CO2) and methane (CH4).

  • Human Activities: Burning fossil fuels, deforestation, and industrial processes

• Positive effects:

  • Longer growing seasons for plants and crops.

  • Increased opportunities for shipping in the Arctic region.

  • Expansion of habitats for some species like insects and birds.

  • More opportunities for outdoor activities in warmer climates.

• Negative effects

  • Rising sea levels that can flood coastal areas.

  • More extreme weather events like hurricanes and heatwaves.

  • Loss of habitats for polar bears and other Arctic species.

  • Disruption of ecosystems and wildlife due to changing climates..

Globalization

• Interconnectedness of countries through trade, communication, and cultural exchange.

• how it works

  • Globalization works by promoting international trade, investment, and the flow of information across borders.

• forms of globalization

  • Economic globalization - How the world has joined economically through trade and other economic activities 

  • Political globalization - How the world has joined politically through political organizations, like NATO (North Atlantic Treaty Organization), UN (United Nations), AU (African Union)

  • Cultural globalization - How the World has joined culturally, for we can experience different cultures and ideas through technology.

•  the impact of globalization.

• Positive

  • Increased economic opportunities

  • Technological advancements

  • Improved access to information and education

• Negative

  • Exploitation of labor

  • Environmental degradation

  • Loss of cultural identity

Tourism

• Industry involving travel for leisure or business purposes.

• Benefits

  • Its creates employment opportunities for people

  • It contributes to economic growth and development.

  • Tourism promotes cultural exchange between visitors and locals

  • Infrastructure development such as roads, airports and hotels

• Effects

• Positive

  • Cultural exchange and understanding

  • Economic growth and job creation

  • Infrastructure development

  • Preservation of cultural heritage

• Negative

  • Overcrowding and strain on local resources

  • Environmental degradation and pollution

  • Displacement of local communities

  • Loss of cultural heritage and traditions

  • Increased crime and social problems

Climate change

Long-term changes in Earth's climate patterns due to human activities such as burning fossil fuels, deforestation, and pollution.

Foreign aid

• Financial assistance provided by one country to another in need.

•  It can be used to support economic development, disaster relief, or humanitarian efforts and reducing poverty.

Environmental problems

• Issues arising from human activities that harm the environment.

• They can be caused by industrialization, globalization, tourism, foreign aid, or other factors. 

• Some examples of environmental problems include pollution, deforestation, climate change, and loss of biodiversity.

Energy

Various forms of energy shaping the environment.

Water

Vital component of the physical environment influencing ecosystems and societies.

Water-Energy Nexus

Interdependence of water and energy crucial for sustainable development.