<< Chapter < Page Chapter >> Page >

Sosiale wetenskappe: aardrykskunde

Graad 7

Bevolkingsgroei en verandering

Module 6

Die faktore wat groei en verandering beïnvloed

Aktiwiteit 1:

Om vrae oor die verspreiding van die wêreldbevolking te beantwoord

[lu 1.5]

  • Die wêreldbevolking is nie eweredig versprei nie. Hoekom nie ? Bestudeer die wêreldkaart [fig. 2, bevolkingsverspreiding] en kaarte in jou atlas, en beantwoord die daaropvolgende vrae:

2. Die verspreiding van mense oor die wêreld

a) Om watter rede is daar ’n yl bevolking by a , b en c ?

b) Om watter rede is die bevolking by d en e ook besonder yl?

c) Het die Amasonerivier in Brasilië iets met die bevolkingsverspreiding in dié land te doen? (Verduidelik)

d) Verduidelik die oorsaak vir die bevolkingskonsentrasie in die noordoostelike hoek van Afrika.

e) Sou julle sê dat Australië in die geheel gesien verstedelik is?

3. Bevolkingstrukture

Die jong bevolking soos uitgebeeld met behulp van die bevolkingspiramide in figuur 1 was dié van Engeland en Wallis in 1881. Vyftig jaar later het die prentjie heelwat anders gelyk, en nog vyftig jaar later het dit verdere verandering ondergaan. Die verandering word demografiese oorgang genoem.

Belangrike kenmerke van ‘n bevolking wat met ‘n tipiese piramide (met ‘n breë basis) aangetoon word, is (a) hoë geboortesyfer, (b) hoë sterftesyfer, (c) kort lewensverwagting.

Die toename in bevolking van enige groep (‘n land of gemeenskap) word met die volgende formule bereken:

Bt = g – s (+ of – netto migrasie)

Bt is die B evolkings t oename

G is die G eboortesyfer

S is die S terftesyfer

immigrante word bygetel , en

emigrante word afgetrek

As die Bt ‘n relatief hoë syfer is, sal die bevolkingstruktuur as ‘n piramide met ‘n opvallend breë basis aangetoon word.

Migrasie geld nie net vir lande nie, maar ook vir bepaalde gemeenskappe binne lande.

Aktiwiteit 2:

Om ‘n afleiding wat betrekking het op bevolkingstoename te maak

[lu 3.2]

Is dit moontlik dat die Bt nie ‘n toename nie, maar ‘n afname kan beteken? Motiveer jou antwoord.

Aktiwiteit 3:

Om die verskille in bepaalde bevolkings in piramides voor te stel

[lu 3.2]

  • Wanneer geboortes en sterftes normaalweg voorkom in gemeenskappe, en mits daar nie groot getalle mense deur migrasie bykom of vertrek nie, sal die bevolkingstruktuur met ‘n taamlik “normale” piramide voorgestel kan word, soos Figuur 1. Julle weet dit al, maar stel julle net ‘n smaller basis voor.

Binne dié normale gemeenskappe met hul “normale” piramides kan kulturele, sosiale en ekonomiese faktore tot gevolg hê dat die samestelling ten opsigte van ouderdomsgroepe en die verteenwoordiging van die geslagte verander. Die vorm van die piramide waarmee die bepaalde gemeenskap dan voorgestel word, sal van die “normale” een begin afwyk. As daar jaarliks ‘n paar duisend jong Turkse mans uit ‘n deel van Turkye weggaan om in Duitsland, byvoorbeeld in die stad München, te gaan werk, sal die strukture van die Turkse streek sowel as dié van München mettertyd verander.

  1. Die piramide vir gemeenskappe met ‘n hoë geboortesyfer , hoë sterftesyfer en ‘n kort lewensverwagting , sal steeds ‘n “normale” piramidevorm hê, maar met ‘n laer bopunt en opvallende inkepings aan die kant.

Questions & Answers

Discuss the differences between taste and flavor, including how other sensory inputs contribute to our  perception of flavor.
John Reply
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
which drugs can we use for ulcers
Ummi Reply
omeprazole
Kamara
what
Renee
what is this
Renee
is a drug
Kamara
of anti-ulcer
Kamara
Omeprazole Cimetidine / Tagament For the complicated once ulcer - kit
Patrick
what is the function of lymphatic system
Nency Reply
Not really sure
Eli
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include: 1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
what is anatomy
Oyindarmola Reply
Anatomy is the identification and description of the structures of living things
Kamara
what's the difference between anatomy and physiology
Oyerinde Reply
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Mohammed Reply
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
yes
Prince
how does the stomach protect itself from the damaging effects of HCl
Wulku Reply
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
Ali Reply
function of digestive
Ali
the diagram of the lungs
Adaeze Reply
what is the normal body temperature
Diya Reply
37 degrees selcius
Xolo
37°c
Stephanie
please why 37 degree selcius normal temperature
Mark
36.5
Simon
37°c
Iyogho
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
37A c
Wulku
what is anaemia
Diya Reply
anaemia is the decrease in RBC count hemoglobin count and PVC count
Eniola
what is the pH of the vagina
Diya Reply
how does Lysin attack pathogens
Diya
acid
Mary
I information on anatomy position and digestive system and there enzyme
Elisha Reply
anatomy of the female external genitalia
Muhammad Reply
Organ Systems Of The Human Body (Continued) Organ Systems Of The Human Body (Continued)
Theophilus Reply
what's lochia albra
Kizito
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Aardrykskunde graad 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11020/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Aardrykskunde graad 7' conversation and receive update notifications?

Ask