Grade 8

Chemical Properties of Water

 Chemical properties of water: Light Absorption: How much light a certain amount of water can absorb (important for aquatic plants) ...
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/ Alkalinity, Grade 8, Light Absorption, pH, Solvent, Water

Ecosystem Dependence on Water

 Why do ecosystems depend so heavily on water? Water has lots of oxygen (from the atmosphere as rain)   It is essential ...
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/ Food, Grade 8, Jobs, Oxygen, Photosynthesis, Tourism, Water

Eutrophication

Eutrophication occurs when water is enriched by added nutrients getting into water bodies like rivers, dams or estuaries.  This can ...
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/ Algal Overgrowth, Gastroenteritis, Grade 8, Nutrients, pollution, Water

Food Chains and Food Webs

Food chains Food chains show the feeding relationships between living things. A food chain always start with producers (green plants ...
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/ biodiversity, Biomass, Food Chain, Grade 8, Water

Importance of Wetlands to Animals and People

 Why are wetlands so important? Many animals depend on wetlands for some part of their life-cycle, like fish, frogs and mosquitoes. Wetland plants are supporting many ...
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/ Controls Flooding, Food Chains, Grade 8, Shelter, Water

Summary Of Water-related Diseases

A summary of water-related diseases You do not have to learn all the diseases and symptoms by heart, but concentrate ...
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/ Bilharzia, Cholera, Grade 8, Malaria, Prevention, Symptoms, Water

Threats to Wetlands

South Africa’s wetlands are the most threatened ecosystem in the country, the National Biodiversity Assessment 2011 (NBA 2011) has found ...
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/ Agriculture, Dumping Pollutants, Grade 8, Huge Dams, Water

Water for Ecosystems

Ecosystems There are many different kinds of ecosystems find in the land and in water. For example, there are forest, ...
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/ Abiotic, Autotrophs, Biotic, Consumers, Grade 8, Producers, Water