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Sosiale wetenskappe: aardrykskunde

Graad 7

Bevolkingsgroei en verandering

Module 7

Hoekom mense migreer

1. Hoekom migreer mense?

Vir eeue al beweeg mense van hul woonplekke af na plekke waar hulle dink beter lewensomstandighede op hul wag, behalwe in gevalle waar dit gedwonge verskuiwings is, en mense geen keuse het nie.

Permanente verhuisings word grootliks deur die volgende beïnvloed:

klimaat : (aangename temperatuur – tussen 10°C en 30°C – en gemaklike lugvogtigheid);

ekonomie: (mense gaan waar geld te maak is, al is die klimaat onaangenaam);

politieke besluite: (’n land se regering kan deur sy besluite ’n verskuiwing teweegbring).

Maar daar is ‘n verdere keuse: in die stad of op die platteland ?

Die meeste van julle woon in stede of groot dorpe! Dit is ‘n feit, want meer as die helfte van ons land is VERSTEDELIK . Dit beteken dat meer as 50% van ons land se mense in groot dorpe of stede woon.

[Sulke syfers word met sensus opnames vasgestel.]

Aktiwiteit 1:

Om vrae oor bevolkingsdigtheid en verstedeliking te bespreek

[lu 1.2]

Bevolkingsverspreidingskaarte bevestig dat die mensdom op sekere plekke gekonsentreer is. Dit is natuurlik ook waar van ons land. Eers sedert 50 jaar gelede kon ons sê dat die meeste mense in ons land in en om stede en baie groot dorpe saamgetrek is. In Suid-Afrika duur die migrasie van die platteland na die stad steeds voort.

Statistiek oor hoe vinnig verstedeliking in die verlede in Europa plaasgevind het:

1. Brittanje:

1800 – 25% van die bevolking verstedelik

1900 – 75% van die bevolking verstedelik

2000 – meer as 95%

2. Die stad Milaan in Italië:

Tussen 1951 en 1956 het die inwonertal van dié stad met 1,5 miljoen toegeneem! Nie minder nie as 70% van hierdie nuwe intrekkers was uit die platteland van Suid-Italië afkomstig. Kan jy dink waarom? Noem ‘n soortgelyke voorbeeld in Suid-Afrika.

Het jy enige idee wat die bevolking van jou dorp of stad is? Die groeplede kan raai en daaroor argumenteer en dit neerskryf. Daarna kan julle die regte inligting opspoor en jul eerste antwoorde daarmee vergelyk.

Sou jy sê dat die bevolkingsdigtheid van jou woonplek besig is om toe te neem of af te neem? Gaan meer mense weg, of trek meer mense daarheen as vroeër? Waaraan kan mens dit sien? Waarom gebeur dit? Of bly dit konstant?

Gesels met jou ouers of ander inwoners hieroor. Vra ‘n amptenaar van die stadsraad of munisipaliteit, of ‘n streeksbeplanner om hieroor te kom gesels. (Uitnodigingsbrief skakel met taal).

1.1 Hoekom verkies mense ‘n stedelike leefwyse?

Julle weet reeds dat verstedeliking ‘n wêreldwye verskynsel is. Soos die wêreldbevolking toeneem, groei die behoefte aan woonplek. Daardie woonplek word oorwegend in stede en groot dorpe geskep, want dit is waar die meeste mense wil bly. Stede en groot dorpe word dus groter en groter, terwyl kleiner dorpies meestal kwyn.

Bestudeer die grafiek en kyk waar ons land inpas. Hier word net ‘n paar lande genoem sodat julle kan vergelyk. Daar is state, eilandstate soos Singapoer en Bermuda, wat 100% verstedelik is. Monaco, die klein staatjie aan die Middellandse See, is ook 100% verstedelik. In werklikheid is dié staat ‘n stad!

Questions & Answers

How we are making nano material?
LITNING Reply
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LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
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
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Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
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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
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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 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
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Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
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
how can I make nanorobot?
Lily
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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
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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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