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Aardrykskunde

Graad 4

Hulpbronne en dienste in ‘n nedersetting

Module 14

Water in ons huise

Water as hulpbron

Sonder water is lewe op aarde nie moontlik nie. Water is ook die bestanddeel wat die meeste op die aarde voorkom – dit bedek ongeveer 80 % van ons planeet se oppervlakte. Van hierdie 80 % is slegs 3 % varswater, en die meeste van hierdie varswater kom voor in ysvorm, naamlik in die ysvelde by die Noord- en Suidpool.

‘n paar interessante feite:

  • Tussen 60% en 70% van jou liggaam bestaan uit water.
  • 85% van jou brein is water.
  • 25% van jou gebeente is water.
  • 83% van jou bloed is water.
  • ‘n Mens kan langer as twee weke sonder kos oorleef, maar slegs drie dae sonder water.
  • ‘n Mens verloor gemiddeld 2,5 liter water per dag weens sweet, uitaseming en afval.

1.water in ons huise

Noudat julle kennis gemaak het met al die interessante gegewens oor die mens en water, is julle oortuig daarvan dat water die heel belangrikste hulpbron is? Hou gerus ‘n klasbespreking daaroor.

Waarvoor het julle gesin water nodig? gesels met jou maat daaroor en vul die lysie in die blok hieronder met julle eie antwoorde aan.

Aktiwiteit 1

Om oor die gebruike van water in en om die huis te gesels [lu 2.2]

Water vir ons huisgesin

  1. Ons drink almal water.

2. Mamma gebruik dit as sy kos kook.

3. ................................................................................................................

4. ................................................................................................................

5. ................................................................................................................

6. ................................................................................................................

7. ................................................................................................................

8 ...............................................................................................................

2.waar kom julle water vandaan?

Wanneer dit reën, vloei die water in riviere en strome en uiteindelik beland dit in groot damme wat in die riviere gebou is. Dit word opgaardamme genoem. Van die opgaardamme word dit met groot pype na waterwerke vervoer waar die nodige suiwering van die water plaasvind. Hierna word dit met kleiner pypleidings na die dorpe en stede en uiteindelik ons eie huise vervoer. Vind uit watter opgaardam(-me) naaste aan julle is. Skryf die dam(-me) se naam/name hier neer:

Aktiwiteit 2

Om die faktore te identifiseer wat veroorsaak dat sommige mense beter toegang tot skoon water het as ander [lu3.2]

3.toegang tot water

  • Ons regering bestee baie geld om vir al die mense in ons land skoon water vir drink- en huishoudelike gebruik te voorsien. Die ideaal is dat elke huishouding lopende water wat skoon en veilig is, in die huis moet hê.
  • Daar is egter nog baie mense wat ver moet loop om hulle water in houers te gaan haal en huis toe te dra. Dikwels skep hulle die water uit riviere wat besoedel word deur mense, diere en fabrieke. Die besoedelde water veroorsaak siektes waaraan mense kan sterf.
  • Informele nedersettings ontstaan en groei soms so vinnig dat plaaslike regerings nie betyds lopende water kan aanlê nie. Die mense bou hulle skuilings naby oop waterbronne soos riviere. Almal gebruik dan dieselfde bron. Mense skep hulle drinkwater daaruit, maar was ook hulself en hulle wasgoed daarin. Kinders speel of swem daarin en diere mors daarin. Daar word ook dikwels afvalwater uit fabrieke in die riviere gestort.

Assessering

Leeruitkoms 2: aardrykskundige kennis en begrip

Die leerder is in staat om aardrykskundige en omgewingskennis en -begrip te toon.

Assesseringstandaard

Dis duidelik wanneer die leerder

2.2 die belangrikheid beskryf van toegang tot hulpbronne en dienste.

Leeruitkoms 3: verkenning van vraagstukke

Die leerder is in staat om ingeligte besluite oor sosiale en omgewingsvraagstukke en –probleme te neem.

Assesseringstandaard

Dis duidelik wanneer die leerder

3.2 faktore identifiseer wat veroorsaak dat sommige mense in ‘n spesifieke konteks groter toegang tot hulpbronne het as ander.

Memorandum

Die gebruike van water in en om die huis

  1. Reiniging
  2. Tuin
  3. Swembad

Questions & Answers

what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Aardrykskunde graad 4. OpenStax CNX. Oct 21, 2009 Download for free at http://cnx.org/content/col11083/1.2
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