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Graad 4

Lewe en lewenswyse

Module 23

Voorsiening van skoon water


Om die voorsiening van skoon water aan huishoudings te beskryf

[lu 3.2]

Wanneer ons water wil hê, draai ons net ‘n kraan oop. Het jul al ooit gewonder waar daardie water vandaan kom?

Kom ons toer saam met Walter Waterdruppel op sy reis na ‘n kraan.

a. Walter in die rivier op pad na die ________________________________

b. Van die opgaardam gaan hy met


na ‘n munisipale dam by ‘n dorp of ‘n stad.

c. Walter verlaat die munisipale dam deur ‘n

dik ___________

d. en hierdie pyp vertak in________

e. Om Walter op sy reis te help, moet jy die _______ oopdraai.

(a) Verduidelik hoekom ‘n kraan wat toe is, steeds kan drup en sodoende water mors.

(b) Noem drie redes waarom ‘n gestremde persoon, of ouer en klein kindertjies dit moeilik mag vind om ‘n kraan oop te draai.


Vind uit waarvandaan jou dorp of stad se water kom.

Waarom is opgaardamme waardevol? Gee twee redes.

Vind ook uit watter groot opgaardam in jou omgewing is.

  1. Watter groot opgaardam kry ons in die Oranjerivier?
  1. Watter soort damme voorsien water aan dorpe en stede?
  1. Watter groot dam voorsien Johannesburg van water?
  1. Waarin word water wat op huise se dakke val, opgevang?
  1. Watter dam is naby die Paarl?


LU 3

WETENSKAP, DIE SAMELEWING EN DIE OMGEWING Leerders is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Dit is duidelik wanneer die leerder:

3.1   wetenskap en tegnologie in die konteks van geskiedenis en inheemse kennis verstaan;

3.2   die impak van wetenskap en tegnologie verstaan;

3.3       vooroordeel in wetenskap en tegnologie herken.


Verspreiding van water

Walter Waterdruppel se reis na ‘n kraan:

  1. Die reën kom uit die wolke op die aarde.
  2. Opgaardam
  3. Pypleiding
  4. pyp dunner pype
  5. kraan
  6. Daar is net twee plekke waar ‘n kraan kan lek: by die rubberwaster waar die water uitkom en by die grys pakstuk waar die watervloei beheer word.
  • Die kraan is nie reg toegedraai nie.
  • Die waster het dalk barsies in of dit is platgedruk.
  • Daar is dalk sandkorreltjies wat die rubber beskadig binne-in die kraanomhulsel.
  • Wanneer water by die boonste deel uitlek, moet die moertjie by die boonste draaistam net vaster gedraai word.

g) 1. hulle hande is dalk te klein of te swak

  1. krane in openbare plekke wat deur die publiek gebruik word, behoort lang handvatsels te hê wat maklik oopdraai
  2. die kraan is dalk onnodig styf toegedraai


Kom ons vind uit:

  • Waarom is opgaardamme waardevol?
  • Altyd water vir huishoudelike gebruik (bv. In winter as rivier leeg is)
  • Besproeiing
  • Gariepdam
  • Munisipale opgaardamme
  • Vaaldam
  • Tenks
  • Wemmershoekdam

Questions & Answers

what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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.
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
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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