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Sosiale wetenskappe: aardrykskunde

Graad 6

Klimaat en plantegroeistreke van die wêreld

Module 8

Klimaat en plantegroeistreke van die wêreld

Die klimaat en plantegroeistreke van die wêreld

Jy weet reeds dat die weerstoestande oor ‘n lang tydperk (20 – 35 jaar) ‘n spesifieke plek se klimaat vorm. Omdat weer nie absoluut voorspelbaar is nie, kan ons nie definitief sê dat dit Nuwejaarsdag in Kaapstad sal reën nie, maar ons weet wel dat Januarie normaalweg ‘n droër maand as Junie sal wees. Klimaatstoestande het oor ‘n lang tydperk getoon dat Kaapstad sy meeste reën in die winter kry.

Wanneer ons die eienskappe van plekke se klimaat bestudeer, is dit dus duidelik dat groot gebiede dieselfde gemiddelde toestande ondervind en dus ‘n tipe klimaatstreek vorm. Deur die eeue het die mens hom dikwels laat beïnvloed deur die klimaat as hy moes besluit op ‘n plek van vestiging. Groot dele van die wêreld is òf te koud òf te droog of warm vir mense om in te bly. Dan is daar ook die beskikbaarheid van hulpbronne wat die mens se keuse van ‘n blyplek beïnvloed. Daarom dat die ongeveer ses miljard mense op die aarde maar slegs 15% (3/20) van die aarde se oppervlak bewoon.

1. Faktore wat klimaat beïnvloed

  • Soos julle reeds in graad 5 geleer het, is daar baie faktore wat die klimaat van ‘n streek beïnvloed. Ons gaan vervolgens kyk na faktore wat ‘n invloed op die wêreldklimaat het.

Lengteligging van ‘n plek

Die warmste klimaat is die plekke naaste aan die ewenaar. Hoe verder jy van die ewenaar af beweeg, hoe kouer word dit. Om 12:00 skyn die son feitlik reg van bo by die ewenaar. Die sonstrale is meer gekonsentreerd en daarom styg die temperature hoër. Verder noord en suid val die sonstrale teen ‘n hoek en word dit deur die aarde se ronding oor ‘n groter area versprei. Daarom is die strale minder gekonsentreerd en dit is gevolglik koeler.

Ewenaar : sonstrale feitlik loodreg

Pole : son laer op horison

By die ewenaar veroorsaak die hoë temperature hoë verdamping wat dan weer tot hoër neerslag lei.

Hoogte bo seevlak

Die aarde absorbeer die sonstrale, skakel daarvan om in hitte en straal dit weer uit. Hoe nader jy dus aan die bron van radiasie (uitstraling) is, hoe warmer is dit, en hoe verder jy van die bron af wegbeweeg (bo-op ‘n hoë berg), hoe kouer is dit. Jy kan die beginsel van uitstraling toets deur jou hand eers naby die vuur (verwarmer) te hou en dit dan al verder weg te beweeg. Dit word al kouer hoe verder jy van die hittebron af beweeg.

Dit is meestal koud op hoë berge. Die hoogste bergspitse in die wêreld is altyd met sneeu bedek.

Aktiwiteit 1:

Om inligting uit ‘n atlas te bekom

[lu 1.2, 1.3]

Gebruik jou atlas en vind uit...

  • die naam en hoogte van die hoogste bergpiek in Suid-Afrika;
  • wat die lengte- en breedteligging van Kilimandjaro is.

Invloed van seestrome / oseane

Die temperatuur van die nabygeleë oseane beïnvloed die landtemperatuur. Winde waai die warm of koue lug wat oor die warm of koue oseaan is na die land toe en verhoog of verlaag so die temperatuur van die land. So is daar ook winde wat van die poolstreke noord- of suidwaarts vloei en koue lug oor die land inwaai.

Questions & Answers

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
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
anyone know any internet site where one can find nanotechnology papers?
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
Maciej
characteristics of micro business
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
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
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Source:  OpenStax, Aardrykskunde graad 6. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10999/1.1
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