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Aardrykskunde

Graad 5

Hulpbronne

Module 18

Natuurlike hulpbronne: minerale

Minerale as natuurlike hulpbron

Suid-Afrika is ryk aan minerale soos goud, yster, steenkool, platinum en diamante. Soos die kaart op die volgende bladsy duidelik aandui, is die minerale van Suid-Afrika in die noordoostelike deel van ons land gekonsentreer. Steenkool en goud maak ‘n baie groot persentasie van ons land se minerale rykdom uit.

Minerale van Suid-Afrika

Sommige van die minerale word op die oppervlak gedelf (diamante), terwyl ander diep onder die grond onder baie gevaarlike omstandighede gemyn word.

Yster, wat ‘n kernkomponent in die vervaardiging van staal is, is weer nie so volop nie. Staal word vervaardig deur ystererts en ander minerale in groot oonde saam te smelt. Plat plate staal word hieruit vervaardig, wat weer later gebruik word om ander produkte te vervaardig. Staal vorm ‘n baie belangrike komponent in die moderne vervaardigingsproses. Dink maar net weer aan die motor waarna ons vroeër in die module verwys het. Sonder staal sal die produksielyn vir motorvoertuie buite produksie wees.

Daar is twee hoofmetodes van mynbou:

oop myne;

tonnelmyne.

Minerale soos yster, koper, asbes en diamante word somtyds in oop myne gedelf. Dit is bloot ‘n groot oop gat in die aarde wat op so ‘n manier gegrawe word dat daar ‘n spiraalpad na die diepste deel van die gat lei. So kan voertuie dan tot op elke vlak van die myn beweeg om erts en materiaal te vervoer na die plek van prosessering.

Wanneer minerale egter baie diep onder die grond gevind word, is dit nodig om ‘n skag in die aarde te maak sodat die mynwerkers by die minerale kan uitkom. ‘n Skagtoring word opgerig en ‘n diep gat word in die grond geboor. Uit hierdie gat word dwarsgange en tonnels deur skaggrawers gegrawe tot by die riwwe met delfstowwe. Hierdie gange en tonnels lê op verskillende vlakke.

Die minerale word met dinamiet losgeskiet en dan uitgegrawe. Die “gruis” word dan op ysterbakke (koekepanne), wat soos ‘n trein op ‘n spoor loop, gelaai en met hysbakke na die oppervlak van die grond gehys waar dit verwerk word en oortollige rots op mynhope gegooi word. Die waterige oorblyfsels gaan na ‘n slykdam .

Aktiwiteit

Om 'n diagram van byskrifte te voorsien

[lu 1.1]

  • Raadpleeg weer die vorige paragrawe en voorsien die dwarssnit van ‘n tonnelmyn van die nodige byskrifte.

Assessering

LU 1

AARDRYKSKUNDIGE ONDERSOEK

Die leerder is in staat om ondersoekvaardighede te gebruik om aardrykskundige en omgewingsbegrippe en -prosesse te ondersoek.

Dit is duidelik wanneer die leerder:

  • bronne met nuttige aardrykskundige inligting kan kies en gebruik;
  • tussen feite en menings onderskei [werk met bronne];
  • inligting kategoriseer;
  • sketskaarte en/of planne na aanleiding van veldwaarnemings en afmetings teken [werk met bronne];

1.6 moontlike oplossings vir probleme identifiseer en ondersoek [beantwoord die vraag];

  • deur projekte, bespreking, debat en diagramme, kennis en begrip van die vraagstuk toon [dra die antwoord oor].

Questions & Answers

how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Sosiale wetenskappe: aardrykskunde graad 5. OpenStax CNX. Sep 22, 2009 Download for free at http://cnx.org/content/col10985/1.2
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