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Edexcel B Geography Paper 3 Notes PDF: Ecosystems, Energy and More

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Edexcel B Geography Paper 3 Notes PDF: Ecosystems, Energy and More

Geography Edexcel B Paper 3 content focusing on biomes, ecosystems, and environmental impacts. This comprehensive guide covers the distribution of global ecosystems, their characteristics, and human interactions with the biosphere.

  • The document extensively covers biomes and ecosystems in edexcel b geography, including tropical rainforests, temperate forests, and tundra
  • Explores key theories like Malthus and Boserup regarding resource management and population growth
  • Details human exploitation of biosphere resources and their environmental impacts
  • Examines forest threats and animal adaptations in tropical rainforests
  • Incorporates essential GCSE Geography ecosystems exam questions concepts
...

19/06/2023

2623

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

View

Human Exploitation of the Biosphere and Its Role

This page delves into how humans exploit the biosphere and the crucial roles the biosphere plays in maintaining Earth's systems. It's an essential topic for GCSE Geography Edexcel B revision.

The biosphere is exploited for various resources:

  1. Energy: Areas are cleared for biofuels, coal mines, and power stations. Some regions are flooded for hydroelectric power projects.
  2. Water: Water sources are heavily exploited for human use.
  3. Minerals: Mining operations lead to deforestation and can introduce toxic chemicals into water systems, harming wildlife. Open-pit mining removes large areas of land.

Example: The construction of the Three Gorges Dam in China flooded a large area, displacing millions of people and altering local ecosystems.

The biosphere plays several critical roles:

  1. Regulating gases: Plants absorb CO₂ and release O₂, while animals do the opposite. This process is crucial for maintaining atmospheric balance and mitigating global warming.
  2. Maintaining soil health: Plant roots and animals spread minerals and hold soil together. Vegetation intercepts rainfall, preventing soil erosion and nutrient leaching.
  3. Regulating the water cycle: Plants absorb water, reducing surface flooding. They also store and release water slowly, helping to mitigate the risks of both droughts and floods.

Highlight: The biosphere's role in regulating gases is particularly important in the context of climate change, as it helps to absorb excess CO₂ from the atmosphere.

The page also discusses local factors affecting biome distribution:

  1. Altitude: Higher altitudes are generally colder with fewer plants and nutrient-poor soil.
  2. Rock type: Different rocks weather differently, affecting soil mineral content and permeability.
  3. Soil type: Nutrient-rich soils support more plants, while soil acidity and drainage affect plant growth.
  4. Drainage: Poor drainage leads to waterlogged soil, limiting plant species to those adapted to such conditions.

These factors are crucial in understanding the distribution of biomes and ecosystems in Edexcel B geography.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

View

Resources Provided by the Biosphere and Factors Affecting Demand

This section of the Geography Edexcel B Paper 3 notes focuses on the resources that the biosphere provides and the factors that influence the demand for these resources. It's crucial information for understanding energy resources and environmental impact in Edexcel B.

The biosphere provides several essential resources:

  1. Food: Indigenous people rely on plants and animals for sustenance through hunting, fishing, and crop cultivation.
  2. Medicine: Many plants have medicinal properties, with over 7,000 medicines derived from tropical rainforest species.
  3. Building materials: Various biomes provide materials like pine from taiga forests, sap, reeds, and straw for roofing.
  4. Fuel: Wood, moss, dried grass, and even dried animal dung are used as fuel sources in different parts of the world.

Example: The Amazon rainforest is home to many plants used in modern medicine, including the rosy periwinkle, which is used in treatments for leukemia.

Factors affecting the demand for resources include:

  1. Population growth: More people require more resources, often necessitating the transportation of resources like water over long distances.
  2. Wealth and affluence: Increased disposable income leads to higher consumption of energy and water-intensive products.
  3. Urbanization: Cities are more resource-intensive, requiring street lighting, fountains, and complex systems for food and water distribution and waste removal.
  4. Industrialization: Manufacturing processes consume large amounts of energy and water, particularly in the production of processed goods.

Highlight: The demand for palm oil is a significant driver of deforestation in tropical regions, illustrating the complex relationship between resource demand and environmental impact.

Understanding these factors is essential for addressing issues of sustainability and resource management in GCSE Geography Edexcel B.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

View

Forests Under Threat: Tropical Rainforests

This section of the Geography Edexcel B Paper 3 notes focuses on tropical rainforests, their unique characteristics, and the threats they face. It's crucial information for understanding biomes and ecosystems in Edexcel B geography.

Tropical rainforests are characterized by their complex interdependence:

  1. Warm climate promotes rapid plant growth.
  2. Dense leaf cover protects the forest floor, while root systems prevent soil erosion.
  3. Lack of wind means plants rely on insects and animals for pollination.
  4. Epiphytes grow on high plants to access light.
  5. Deforestation reduces the forest's capacity to absorb CO₂.

Vocabulary: Epiphytes are plants that grow on other plants for physical support, not nutrients.

Animal adaptations in tropical rainforests include:

  1. Strong limbs for tree climbing
  2. Skin flaps for gliding between trees
  3. Suction cups for climbing
  4. Camouflage to hide from predators
  5. Nocturnal behavior to conserve energy
  6. Adaptations for low light conditions, such as sharp smell and hearing in anteaters
  7. Swimming abilities

The rapid nutrient cycling in tropical rainforests contributes to:

  1. High biodiversity: Tropical rainforests contain 50% of the world's plant, animal, and insect species.
  2. Stable environment: The layered structure provides many habitats.
  3. High productivity: Plants grow quickly year-round.
  4. Complex food webs: Many different species create intricate food chains that form complex webs.

Definition: Biodiversity refers to the variety of plant and animal life in a particular habitat or ecosystem.

The section also addresses the increasing rates of deforestation, citing factors such as:

  1. Poverty: Many small-scale subsistence farmers clear forest land for agriculture.
  2. Foreign debt: Poor countries exploit rainforest resources to repay debts.
  3. Economic development: Road and rail construction opens up areas for logging, mining, and farming.

Highlight: Climate change poses an indirect threat to tropical rainforests. Higher temperatures and reduced rainfall can lead to droughts, ecosystem stress, and increased risk of forest fires.

Understanding these threats is crucial for addressing conservation issues in GCSE Geography Edexcel B.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

View

Tropical Rainforest Threats and Climate Change

This final section of the Geography Edexcel B Paper 3 notes continues the discussion on threats to tropical rainforests, with a particular focus on climate change. It's essential information for GCSE Geography Edexcel B revision.

Climate change poses significant indirect threats to tropical rainforests:

  1. Higher temperatures and lack of rainfall lead to drought conditions.
  2. Droughts cause ecosystem stress, potentially leading to species extinction.
  3. Increased frequency and intensity of forest fires can destroy large areas of rainforest.

Example: The Amazon rainforest experienced severe droughts in 2005, 2010, and 2015, which were linked to climate change and resulted in widespread tree mortality and increased fire risk.

The impact of these threats is far-reaching:

  1. Loss of biodiversity: As the rainforest ecosystem is disrupted, many species may face extinction.
  2. Reduced carbon sequestration: Fewer trees mean less CO₂ is absorbed from the atmosphere, potentially accelerating global warming.
  3. Altered water cycle: Deforestation can lead to changes in local and regional rainfall patterns.
  4. Soil degradation: Without the protective forest cover, soil can quickly erode, reducing its fertility.

Highlight: The loss of tropical rainforests can create a feedback loop, where deforestation contributes to climate change, which in turn further threatens the remaining forests.

Understanding these complex interactions between climate change and tropical rainforests is crucial for addressing global environmental issues. It's a key topic in Geography Edexcel B Paper 3 2023 and is likely to feature in GCSE Geography Paper 2 Edexcel B as well.

The notes emphasize the need for sustainable management practices and international cooperation to protect these vital ecosystems. Students should be prepared to discuss both the direct human impacts on rainforests (such as deforestation for agriculture and logging) and the indirect threats posed by global climate change.

Vocabulary: Carbon sequestration refers to the process of capturing and storing atmospheric carbon dioxide, which trees do naturally as they grow.

This comprehensive overview of tropical rainforest threats provides students with the knowledge needed to tackle GCSE geography ecosystems exam questions and understand the complex interplay between human activities, ecosystems, and global climate systems.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

View

@@ -326 @@ -> Definition: Biomes are large-scale ecosystems with distinct climate conditions and characteristic vegetation. +> Definition: Biomes are large-scale natural ecosystems characterized by specific climate conditions, vegetation types, and wildlife adaptations.

-The page details various biome types: -* Tropical forests with consistent temperatures of 20-28°C and high biodiversity -* Temperate forests experiencing four seasons with high rainfall -* Boreal forests characterized by extreme temperature variations -* Grasslands in both tropical and temperate varieties -* Tundra regions with unique light patterns and sparse vegetation +The content explores the Distribution and characteristics of large-scale natural global ecosystems, including detailed analysis of tropical forests (20-28°C, high biodiversity), temperate forests (four distinct seasons), boreal forests (extreme temperature variations), grasslands (both tropical and temperate varieties), and tundra (unique light patterns). -> Highlight: The Boserup theory suggests that human innovation will always keep pace with population growth, ensuring sufficient resource supply. +> Highlight: The page presents two contrasting theories about resource supply: Malthus's pessimistic view of population outstripping resources, and Boserup's optimistic perspective on human innovation maintaining resource adequacy. -> Example: The biosphere's role in regulating gases includes plants taking in CO₂ and releasing O₂, while animals do the opposite, maintaining atmospheric balance. +> Example: The biosphere's regulatory functions include gas exchange (CO₂/O₂ cycle), water cycle regulation, and soil health maintenance through root systems and vegetation cover. + +> Vocabulary: Abiotic factors refer to non-living environmental elements, while biotic factors include all living organisms in an ecosystem.

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Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

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Knowunity is the #1 education app in five European countries

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Lena, iOS user

I love this app ❤️ I actually use it every time I study.

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Geography

Edexcel B Geography Paper 3 Notes PDF: Ecosystems, Energy and More

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ariana 💿🎧⚡️

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Geography Edexcel B Paper 3 content focusing on biomes, ecosystems, and environmental impacts. This comprehensive guide covers the distribution of global ecosystems, their characteristics, and human interactions with the biosphere.

  • The document extensively covers biomes and ecosystems in edexcel b geography, including tropical rainforests, temperate forests, and tundra
  • Explores key theories like Malthus and Boserup regarding resource management and population growth
  • Details human exploitation of biosphere resources and their environmental impacts
  • Examines forest threats and animal adaptations in tropical rainforests
  • Incorporates essential GCSE Geography ecosystems exam questions concepts
...

19/06/2023

2623

 

10/11

 

Geography

65

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

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Human Exploitation of the Biosphere and Its Role

This page delves into how humans exploit the biosphere and the crucial roles the biosphere plays in maintaining Earth's systems. It's an essential topic for GCSE Geography Edexcel B revision.

The biosphere is exploited for various resources:

  1. Energy: Areas are cleared for biofuels, coal mines, and power stations. Some regions are flooded for hydroelectric power projects.
  2. Water: Water sources are heavily exploited for human use.
  3. Minerals: Mining operations lead to deforestation and can introduce toxic chemicals into water systems, harming wildlife. Open-pit mining removes large areas of land.

Example: The construction of the Three Gorges Dam in China flooded a large area, displacing millions of people and altering local ecosystems.

The biosphere plays several critical roles:

  1. Regulating gases: Plants absorb CO₂ and release O₂, while animals do the opposite. This process is crucial for maintaining atmospheric balance and mitigating global warming.
  2. Maintaining soil health: Plant roots and animals spread minerals and hold soil together. Vegetation intercepts rainfall, preventing soil erosion and nutrient leaching.
  3. Regulating the water cycle: Plants absorb water, reducing surface flooding. They also store and release water slowly, helping to mitigate the risks of both droughts and floods.

Highlight: The biosphere's role in regulating gases is particularly important in the context of climate change, as it helps to absorb excess CO₂ from the atmosphere.

The page also discusses local factors affecting biome distribution:

  1. Altitude: Higher altitudes are generally colder with fewer plants and nutrient-poor soil.
  2. Rock type: Different rocks weather differently, affecting soil mineral content and permeability.
  3. Soil type: Nutrient-rich soils support more plants, while soil acidity and drainage affect plant growth.
  4. Drainage: Poor drainage leads to waterlogged soil, limiting plant species to those adapted to such conditions.

These factors are crucial in understanding the distribution of biomes and ecosystems in Edexcel B geography.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

Sign up to see the content. It's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Resources Provided by the Biosphere and Factors Affecting Demand

This section of the Geography Edexcel B Paper 3 notes focuses on the resources that the biosphere provides and the factors that influence the demand for these resources. It's crucial information for understanding energy resources and environmental impact in Edexcel B.

The biosphere provides several essential resources:

  1. Food: Indigenous people rely on plants and animals for sustenance through hunting, fishing, and crop cultivation.
  2. Medicine: Many plants have medicinal properties, with over 7,000 medicines derived from tropical rainforest species.
  3. Building materials: Various biomes provide materials like pine from taiga forests, sap, reeds, and straw for roofing.
  4. Fuel: Wood, moss, dried grass, and even dried animal dung are used as fuel sources in different parts of the world.

Example: The Amazon rainforest is home to many plants used in modern medicine, including the rosy periwinkle, which is used in treatments for leukemia.

Factors affecting the demand for resources include:

  1. Population growth: More people require more resources, often necessitating the transportation of resources like water over long distances.
  2. Wealth and affluence: Increased disposable income leads to higher consumption of energy and water-intensive products.
  3. Urbanization: Cities are more resource-intensive, requiring street lighting, fountains, and complex systems for food and water distribution and waste removal.
  4. Industrialization: Manufacturing processes consume large amounts of energy and water, particularly in the production of processed goods.

Highlight: The demand for palm oil is a significant driver of deforestation in tropical regions, illustrating the complex relationship between resource demand and environmental impact.

Understanding these factors is essential for addressing issues of sustainability and resource management in GCSE Geography Edexcel B.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

Sign up to see the content. It's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Forests Under Threat: Tropical Rainforests

This section of the Geography Edexcel B Paper 3 notes focuses on tropical rainforests, their unique characteristics, and the threats they face. It's crucial information for understanding biomes and ecosystems in Edexcel B geography.

Tropical rainforests are characterized by their complex interdependence:

  1. Warm climate promotes rapid plant growth.
  2. Dense leaf cover protects the forest floor, while root systems prevent soil erosion.
  3. Lack of wind means plants rely on insects and animals for pollination.
  4. Epiphytes grow on high plants to access light.
  5. Deforestation reduces the forest's capacity to absorb CO₂.

Vocabulary: Epiphytes are plants that grow on other plants for physical support, not nutrients.

Animal adaptations in tropical rainforests include:

  1. Strong limbs for tree climbing
  2. Skin flaps for gliding between trees
  3. Suction cups for climbing
  4. Camouflage to hide from predators
  5. Nocturnal behavior to conserve energy
  6. Adaptations for low light conditions, such as sharp smell and hearing in anteaters
  7. Swimming abilities

The rapid nutrient cycling in tropical rainforests contributes to:

  1. High biodiversity: Tropical rainforests contain 50% of the world's plant, animal, and insect species.
  2. Stable environment: The layered structure provides many habitats.
  3. High productivity: Plants grow quickly year-round.
  4. Complex food webs: Many different species create intricate food chains that form complex webs.

Definition: Biodiversity refers to the variety of plant and animal life in a particular habitat or ecosystem.

The section also addresses the increasing rates of deforestation, citing factors such as:

  1. Poverty: Many small-scale subsistence farmers clear forest land for agriculture.
  2. Foreign debt: Poor countries exploit rainforest resources to repay debts.
  3. Economic development: Road and rail construction opens up areas for logging, mining, and farming.

Highlight: Climate change poses an indirect threat to tropical rainforests. Higher temperatures and reduced rainfall can lead to droughts, ecosystem stress, and increased risk of forest fires.

Understanding these threats is crucial for addressing conservation issues in GCSE Geography Edexcel B.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

Sign up to see the content. It's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Tropical Rainforest Threats and Climate Change

This final section of the Geography Edexcel B Paper 3 notes continues the discussion on threats to tropical rainforests, with a particular focus on climate change. It's essential information for GCSE Geography Edexcel B revision.

Climate change poses significant indirect threats to tropical rainforests:

  1. Higher temperatures and lack of rainfall lead to drought conditions.
  2. Droughts cause ecosystem stress, potentially leading to species extinction.
  3. Increased frequency and intensity of forest fires can destroy large areas of rainforest.

Example: The Amazon rainforest experienced severe droughts in 2005, 2010, and 2015, which were linked to climate change and resulted in widespread tree mortality and increased fire risk.

The impact of these threats is far-reaching:

  1. Loss of biodiversity: As the rainforest ecosystem is disrupted, many species may face extinction.
  2. Reduced carbon sequestration: Fewer trees mean less CO₂ is absorbed from the atmosphere, potentially accelerating global warming.
  3. Altered water cycle: Deforestation can lead to changes in local and regional rainfall patterns.
  4. Soil degradation: Without the protective forest cover, soil can quickly erode, reducing its fertility.

Highlight: The loss of tropical rainforests can create a feedback loop, where deforestation contributes to climate change, which in turn further threatens the remaining forests.

Understanding these complex interactions between climate change and tropical rainforests is crucial for addressing global environmental issues. It's a key topic in Geography Edexcel B Paper 3 2023 and is likely to feature in GCSE Geography Paper 2 Edexcel B as well.

The notes emphasize the need for sustainable management practices and international cooperation to protect these vital ecosystems. Students should be prepared to discuss both the direct human impacts on rainforests (such as deforestation for agriculture and logging) and the indirect threats posed by global climate change.

Vocabulary: Carbon sequestration refers to the process of capturing and storing atmospheric carbon dioxide, which trees do naturally as they grow.

This comprehensive overview of tropical rainforest threats provides students with the knowledge needed to tackle GCSE geography ecosystems exam questions and understand the complex interplay between human activities, ecosystems, and global climate systems.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

Sign up to see the content. It's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

@@ -326 @@ -> Definition: Biomes are large-scale ecosystems with distinct climate conditions and characteristic vegetation. +> Definition: Biomes are large-scale natural ecosystems characterized by specific climate conditions, vegetation types, and wildlife adaptations.

-The page details various biome types: -* Tropical forests with consistent temperatures of 20-28°C and high biodiversity -* Temperate forests experiencing four seasons with high rainfall -* Boreal forests characterized by extreme temperature variations -* Grasslands in both tropical and temperate varieties -* Tundra regions with unique light patterns and sparse vegetation +The content explores the Distribution and characteristics of large-scale natural global ecosystems, including detailed analysis of tropical forests (20-28°C, high biodiversity), temperate forests (four distinct seasons), boreal forests (extreme temperature variations), grasslands (both tropical and temperate varieties), and tundra (unique light patterns). -> Highlight: The Boserup theory suggests that human innovation will always keep pace with population growth, ensuring sufficient resource supply. +> Highlight: The page presents two contrasting theories about resource supply: Malthus's pessimistic view of population outstripping resources, and Boserup's optimistic perspective on human innovation maintaining resource adequacy. -> Example: The biosphere's role in regulating gases includes plants taking in CO₂ and releasing O₂, while animals do the opposite, maintaining atmospheric balance. +> Example: The biosphere's regulatory functions include gas exchange (CO₂/O₂ cycle), water cycle regulation, and soil health maintenance through root systems and vegetation cover. + +> Vocabulary: Abiotic factors refer to non-living environmental elements, while biotic factors include all living organisms in an ecosystem.

people and the biosphere biome climates + characteristics tropical forests: - rain, no seasons, 20-28°c, lots of fun -nament-rich soil, ever

Sign up to see the content. It's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

People and the Biosphere: Biome Climates and Characteristics

This section of the Geography Edexcel B Paper 3 notes provides a comprehensive overview of various biomes and their unique characteristics. It covers tropical forests, temperate forests, boreal forests, grasslands, tundra, and deserts, detailing their climate conditions, soil properties, and biodiversity.

Definition: A biome is a large-scale ecosystem characterized by its climate, vegetation, and animal life.

Tropical forests are described as having constant rainfall, no distinct seasons, and temperatures ranging from 20-28°C. They boast nutrient-rich soil, evergreen plants, and high biodiversity.

Temperate forests experience four seasons, high rainfall, and varying hours of sunlight. They have lower biodiversity compared to tropical rainforests but feature thick, nutrient-rich soil with broad-leaf trees and undergrowth.

Highlight: Boreal forests, also known as taiga, have short summers and long winters with temperatures dropping to -20°C in winter and rising to 10°C in summer.

Grasslands are divided into tropical and temperate types. Tropical grasslands have low rainfall and distinct wet and dry seasons, while temperate grasslands experience hot summers and cold winters.

Tundra biomes, found at high latitudes, have extreme light conditions with continuous daylight in summer and darkness in winter. They have low temperatures, low precipitation, and few plant and animal species.

Deserts are characterized by low rainfall and extreme temperature variations between day and night in hot deserts. They have sparse plant growth and thin, nutrient-poor soil.

The section also touches on the Boserup and Malthus theories regarding food supply and population growth, providing a foundation for understanding human interactions with these ecosystems.

Vocabulary: Abiotic factors refer to non-living components of an ecosystem, while biotic factors are the living components.

The interdependence of abiotic and biotic factors is explained, highlighting how water availability affects plant growth, and how plants, in turn, influence the water cycle.

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

20 M

Pupils love Knowunity

#1

In education app charts in 17 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.