National 5 Environmental Science SQA

Full course content, a smart revision plan and instant past paper feedback for National 5 Environmental Science SQA.

Content Overview

64 topics in 4 modules

☑️ Living Environment 18 topics
- Biodiversity
- Quantitative Techniques for Sampling Plants and Animals
- Techniques to Measure Abiotic Factors
- Limitations of Quantitative Techniques and Potential Sources of Error
- The Effect of Abiotic Factors on the Distribution of Organisms
- Identification of Organisms through Construction and Use of Paired-Statement Keys
- Food Webs
- Interdependence between Plants and Animals
- Energy Flow through Food Webs
- Energy Loss through Movement, Heat and Undigested Material
- Factors Affecting Food Webs
- The Carbon Cycle
- The Nitrogen Cycle
- Human Activities with Positive/Negative Effect on Ecosystems
- The Role of Named Indicator Species in Environmental Monitoring
- The Impact of a Named INNS on Ecosystems
- Conflicts between Land and Water Based Activities
- Relevant Current National Organisations (SEPA, SNH, SSSI)
☑️ Earth’s Resources 22 topics
- Identification of the Main Earth Systems
- Classification of Resources
- Structure of the Earth
- Rock Cycle Processes
- Relationship between Rocks, Minerals and Ores
- Properties of Rocks: Porosity and Permeability
- Geosphere: Limestone
- Geological Carbon Cycle
- Geosphere: Iron Ore
- Geosphere: Crude Oil
- Hydrosphere: Water Cycle
- Main Stores of Water
- Uses of Water (Industrial, Domestic and Agricultural)
- Issues Arising from the Availability of Water Resources: Drought and Flooding
- Hydrosphere: Energy from Water
- Requirements and Considerations for Siting Hydro-Electric and Tidal Power Stations
- Oceanic and Freshwater Resources
- Terrestrial Resources
- Energy from Biological Resources
- Composition of the Atmosphere
- Energy from Wind
- Requirements and Considerations for Siting Wind Farms
☑️ Sustainability 20 topics
- Introduction to Sustainability
- Global Citizenship
- Impact of an Increasing Global Population of Food Supplies
- Strategies in Farming for a Secure Food Supply
- Organic Farming
- Strategies in Freshwater and Marine-Based Systems for a Secure Food Supply
- Fish Conservation Approaches
- Environmental Impact of Food Distribution
- Impacts of an Increasing Global Population on Water Supplies
- Issues Arising from Water Use
- Sustainable Approaches to Water Use
- Role of SEPA in Monitoring and Enforcement
- Impacts of an Increasing Global Population on Energy Supplies
- The Enhanced Greenhouse Effect
- Renewable and Non-Renewable Energy Sources and Issues Arising from their Use
- Sustainable Approaches to Reduce Greenhouse Gas Emissions
- Impacts of Climate Change (Social, Economic, Environmental)
- Increase in Waste Production as a Result of an Increasing Global Population and Societal Demands
- Sustainable Approaches to Managing Waste
- Role of SEPA in Waste Management
☑️ Apparatus and Techniques 4 topics
- Apparatus
- Techniques
- Reporting Experimental Work/Fieldwork
- Calculations

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National 5 Environmental Science SQA Revision Content

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National 5 Environmental Science SQA - Living Environment - Biodiversity Content Preview

Living Environment

Revision ContentExam Question

Biodiversity

Biodiversity is a vital subject to grasp in understanding environmental science, as it represents the variety of life on Earth in all its forms and combinations. Here’s your revision guide to help you understand and appreciate this essential concept.

Definition of Biodiversity

Biodiversity is the term used to describe the variety of life on Earth.
It includes all species of plants, animals, fungi, and microorganisms, and their relationships with each other and their environment.
Biodiversity is commonly evaluated at three levels: species diversity, genetic diversity and ecosystem diversity.

Importance of Biodiversity

Biodiversity is critical for maintaining the functioning of ecosystems.
It enables a wide range of services necessary for human survival, including food production, water purification, climate regulation, and disease control.
Biodiversity also has economic value, including tourism and pharmaceutical research.

Biodiversity Hotspots

A biodiversity hotspot is a biogeographic region with a significant concentration of biodiversity that is threatened with destruction.
To qualify, a region must contain at least 1,500 species of vascular plants as endemics and it must have lost at least 70% of its original habitat.
Conservation International has identified 36 biodiversity hotspots. These are often in countries with high population densities and rapid development.

Threats to Biodiversity

Habitat loss, primarily through deforestation, is the greatest threat to biodiversity.
Pollution, particularly from chemicals and plastics, is a significant danger.
Overexploitation of species through hunting and fishing also reduces biodiversity.
Climate change affects ecosystem dynamics and can lead to a loss of species.
Invasive species can out-compete native species, leading to a reduction in biodiversity.

Conservation and Biodiversity

While levels of biodiversity are dropping globally, actions are being taken at all levels to preserve it.
Conservation measures can be targeted at the species level or the habitat level.
Legal protection of endangered species and habitats, the creation of protected areas, strict regulation of hunting and fishing, and the protection of existing habitats are all methods of conservation.
Habitat restoration is another strategy, which involves repairing damaged ecosystems.
Conservation efforts also incorporate education and raising public awareness about the importance of biodiversity.

By understanding the importance, threats and concepts related to biodiversity, you will be much better placed to comprehend the broader ideas within environmental science.

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