Grade 7

Aquatic Food Webs

Many plants and animals are found in and around aquatic ecosystems. These plants and animals depend on one another for ...
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/ Adapt, Food Chain, Grade 7, Migrate, Water

Biodiversity

Wherever you may live in South Africa you share your environment with thousands of different types of plants and animals ...
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/ Cultural, Ecological, Genetic, Grade 7, Species, Water

Biodiversity Importance

It provides some of our basic needs, like building material, furniture and firewood. These things also keep the economy going. It makes the ...
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/ Economy, Grade 7, Medical Benefits, Natural Heritage, Photosynthesis, Water

Food Pyramids

The relationship between organisms, showing who eats whom, or a food chain is shown in a pyramid shape, called a food pyramid ...
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/ Biomass, Ecosystem, Food Pyramid, Grade 7, Ramsar Site, Water

Importance of Wetlands

 Its sponge-like quality allows water to be returned to the  ground  during dry periods. Many different wild animals and plants live there. Wetlands help to slow ...
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/ Filter, Grade 7, Prevents Floods, Sponge, Water, Wildlife

What Aquatic Organisms need to Survive

Certain habitats depend directly on water and are called aquatic habitats, i.e. wetlands, polar and marine ecosystems. Aquatic organisms need clean ...
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/ Clean Water, Grade 7, Oxygen, pH, Suitable Temperature, Water

Why Ecosystems Depend on Water?

Water has lots of oxygen (from the atmosphere as rain)  It is essential for photosynthesis in aquatic plants like algae (reactant in process of ...
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/ Biosphere, Ecology and Ecosystems, Grade 7, Hydrosphere, Water