Summary and Exam Tips for Habitat Destruction
Habitat Destruction is a subtopic of Human Influences on Ecosystems, which falls under the subject Biology in the Cambridge IGCSE curriculum. This topic explores the impact of human activities on natural habitats, leading to a decline in biodiversity. Biodiversity refers to the number of different species living in an area. Key reasons for habitat destruction include the need for increased space for housing, crop, and livestock production, extraction of natural resources, and pollution of freshwater and marine environments.
Human activities disrupt food webs and chains, negatively impacting habitats. Deforestation is a prime example, leading to reduced biodiversity, extinction, soil erosion, flooding, and increased atmospheric carbon dioxide. The rapid clearing of forests for land and materials, exacerbated by modern technology, results in desertification and habitat loss. Soil erosion from deforestation can cause flooding, while climate changes occur due to reduced transpiration and rainfall.
Exam Tips
- Understand Key Terms: Be clear on terms like biodiversity, deforestation, and desertification. Use these terms accurately in your answers.
- Focus on Causes and Effects: Clearly explain the causes of habitat destruction and their effects on the environment. For example, link deforestation to soil erosion and climate change.
- Answer Structure: Pay attention to the question type. For 'why' questions, explain reasons and consequences rather than definitions.
- Use Biology Vocabulary: Incorporate specific biology terms to enhance your answers and demonstrate understanding.
- Mark Allocation: Let the number of marks guide the depth of your response. More marks typically require more detailed answers.
