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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

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
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
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
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 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11020/1.1
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