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Summary Kwartaal 4

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Sukkel jy om opsommings te kry vir n spesifieke vak in jou taal en Graad? Ek het opsommings in Afrikaans en Engels. Kwartaal 1-4 Graad 10 - 12 Vir meer inligting kontak my by: : Email:











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Uploaded on
October 17, 2022
Number of pages
28
Written in
2022/2023
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Annemie du Preez

,Saamgestel deur Annemie du Preez @2022

KWARTAAL 3:

Module 7: Waterhulpbronne: Geografiese kennis Eenheid 1: Water in die wêreld




2. Hoeveel van die aarde se water is vars water?
• Die aarde word die blou planeet genoem omdat meer as 2/3 van sy oppervlak met oseane bedek
is.
2

, Saamgestel deur Annemie du Preez @2022

o 97% soutwater – in die oseane en seë.
Soutwater bevat hoë konsentrasie opgeloste soute. o
Slegs 3% vars water, wat ‘n lae soutinhoud het.
Van hierdie 3%:
 Is byna 70% in gletsers vasgevang – bevrore ysmassas




- Vars water word ook in die atmosfeer geberg.
Die rede hoekom die aarde se varswatervoorraad nie heeltemal opgebruik word nie, is omdat
vars water voortdurend deur die watersiklus geproduseer word.




 30% grondwater – water wat onder die grond in akwifers of natuurlike
ondergrondse waterdraers of reservoirs versteek is Slegs 0,3%
oppervlakwater is in riviere en mere




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