Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
Natural Sciences and Technology Grade 6-A - Thunderbolt Kids Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
VISIT Wetlands in South Africa. goo.gl/PQvKw VISIT Isimangaliso Wetland Park (website). goo.gl/2RT6H What are wetlands? An area is awetland if it has the following: • waterlogged soil, • water-loving plants and • a high water table. If soil is waterlogged, it means that it is full of water. The water table refers to the level in the ground where all the soil below this level is waterlogged (full of water). If an area has ahigh water table, then this level is close to the surface. This means water will not filter down into the ground but remain on the surface forming a wetland. Examples of wetlands are: • marshes • floodplains • swamps • lakes and pans • seeps and springs • estuaries • river banks Look at the pictures of dierent wetlands. 178 Matter and Materials
Wetlands are not necessarily wet throughout the year: • A temporary wetland is wet between 1 and 4months of the year. • A seasonal wetland is wet during the rainy season. This means it will be wet between 5 and 11 months of the year, depending on the length of the rainy season. • A permanent wetland is wet throughout the year. Why are wetlands so important? Wetlands are very special places that should be protected. But why are they so important? Three unique abilities of wetlands make them very important. 1. Wetlands are like giant sponges: Wetlands soak up water and store it. During adrought, when there is not much rain, this stored water can help to keep rivers and streams flowing so that animals and plants can stay alive. Chapter 5. Mixtures and water resources DID YOU KNOW? In South Africa, the most well-known wetlands are the St. Lucia wetlands in KwaZulu-Natal. 179
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VISIT<br />
Wetl<strong>and</strong>s in South<br />
Africa.<br />
goo.gl/PQvKw<br />
VISIT<br />
Isimangaliso Wetl<strong>and</strong><br />
Park (website).<br />
goo.gl/2RT6H<br />
What are wetl<strong>and</strong>s?<br />
An area is awetl<strong>and</strong> if it has the following:<br />
• waterlogged soil,<br />
• water-loving plants <strong>and</strong><br />
• a high water table.<br />
If soil is waterlogged, it means that it is full of water. The water<br />
table refers to the level in the ground where all the soil below this<br />
level is waterlogged (full of water). If an area has ahigh water<br />
table, then this level is close to the surface. This means water will<br />
not filter down into the ground but remain on the surface forming<br />
a wetl<strong>and</strong>.<br />
Examples of wetl<strong>and</strong>s are:<br />
• marshes<br />
• floodplains<br />
• swamps<br />
• lakes <strong>and</strong> pans<br />
• seeps <strong>and</strong> springs<br />
• estuaries<br />
• river banks<br />
Look at the pictures of dierent wetl<strong>and</strong>s.<br />
178 Matter <strong>and</strong> Materials
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