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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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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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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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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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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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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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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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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