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Sosiale wetenskappe: aardrykskunde

Graad 7

Bevolkingsgroei en verandering

Module 9

Bevolkingsgroei en verandering: die impak van miv/vigs

Van die belangrikste invloede op bevolkingsverandering vandag is VIGS. Nog nooit in die geskiedenis was daar ‘n menslike ramp met dieselfde afmetings nie! Die lewensverwagting van hele bevolkings daal, kinders word in hul duisendtalle wees gelaat, armoede neem toe, produksie in bykans alle sektore van die ekonomie neem af, en dies meer.

Afrika is die vasteland wat die ergste getref is, en Suid-Afrika is die ramp ook nie gespaar nie! In die geheel gesien, nader ons ‘n tyd waar bevolkings krimp, eerder as wat daar groei is!

1. Bevolking

Om vas te stel watter invloed MIV/VIGS op die bevolking het, moet ons eers na die beskrywing van ‘n bevolking kyk.

‘n Jong bevolking

Vanweë die geboortesyfer wat baie hoër is as die sterftesyfer, is daar ‘n vinnige groei in die bevolking.

‘n Volwasse bevolking

Hier oortref die geboortesyfer beswaarlik die sterftesyfer en daarom is daar ‘n baie stadige groei in die bevolking.

‘n Ou bevolking

Omdat die geboorte- en sterftesyfer naasteby ooreenkom, is by hierdie soort bevolkingsamestelling geen groei nie.

n Krimpende bevolking

Wanneer die bevolkingsamestelling so lyk, oortref die sterftesyfer die geboortesyfer en sal hierdie bevolking uitsterf.

ouer mense: 60+ volwassenes: 30 - 59 jeug: tot 29

.2. Die ideale toestand wat Suid-Afrika nastreef

’n Baie groot deel van die Suid-Afrikaanse bevolking is arm en nie behoorlik geletterd nie. ‘n Daadwerklike poging moet dus in Suid-Afrika aangewend word om armoede te verlig en geletterdheid op ‘n aanvaarbare vlak te kry. Nog ‘n ideaal is dat gesondheidsdienste verbeter en die bevolkingstoename onder beheer gebring moet word, want ons land het beperkte hulpbronne, soos byvoorbeeld ‘n tekort aan water.

Soos julle uit die grafieke hieronder kan aflei, het die lewensverwagting weens verbeterde sanitasie en mediese sorg gestyg en het die bevolkingstoename aansienlik gedaal in die 20 jaar tussen 1980 en 2000. Die dalende geboortesyfer kan gedeeltelik aan verstedeliking toegeskryf word. In Suid-Afrika het die bevolking dus van ‘n jong bevolking (met ‘n te groot toename) begin verander en is dit op die pad na ‘n meer aanvaarbare volwasse bevolking waar die toename binne perke is.

Suid-Afrika: Groei tussen 1980 en 2000

Suider-Afrikaanse Ontwikkelingsgemeenskap (SAOG): Lewensverwagting in jare

  • Verbeterde mediese sorg, higiëne en algemeen verbeterde lewensgehalte in die SAOG-lande het verseker dat die lewensverwagting van mense gestyg het.
  • As julle na die grafiek kyk, sal julle sien dat die baba wat in die laat vyftigerjare van die vorige eeu in Namibië gebore is, ‘n lewensverwagting van iets oor die 40 jaar gehad het, terwyl een wat 40 jaar later gebore is, na verwagting 20 jaar langer sou leef.

. . . . . . . . . en toe breek die MIV/VIGS-epidemie uit. Mense wat van ‘n pandemie praat, is eintlik korrek, want die siekte kom oor die hele land en vasteland, en die res van die wêreld voor!

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
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 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
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
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
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
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.
Tarell
what is the actual application of fullerenes nowadays?
Damian
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.
Tarell
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.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket 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
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Source:  OpenStax, Aardrykskunde graad 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11020/1.1
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