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Aktiwiteit 5:

Om navorsing oor verwoestyning te doen en ‘n verslag daaroor te skryf

[lu 1.4, 2.3]

  • Die mens veroorsaak dat woestyngebiede al hoe groter word. Dit word verwoestyning (of woestynvorming) genoem. Gaan doen navorsing hieroor. Skryf dan ‘n verslag van ongeveer een bladsy daaroor. Maak ook voorstelle oor hoe die probleem aangespreek kan word.

TOENDRABIOOM EN YSVELDE

  • Die Toendrabioom kom noord van 65 o N voor, in ‘n breë sone rondom die Noordelike Yssee in Alaska, Kanada, Groenland en Ysland, tot aan die Beringsee in die ooste van Asië. In die Suidelike Halfrond is dit net ‘n klein kolletjie op Vuurland aan die suidpunt van Suid-Amerika wat dit verteenwoordig.
  • Die Toendra verduur uiters koue klimaatstoestande. Gedurende die lang, donker wintermaande daal die temperatuur tot ver onder vriespunt. Sneeustorms en yskoue winde waai aaneen. Dan groei niks nie. Die plante het ‘n lang rusperiode, want die grond is gevries.
  • Gedurende die somer kan die temperatuur tot ± 10 o C styg, maar die somer is maar net 3 – 4 maande lank. Net die boonste grondlagie ontdooi en die gesmelte water kan nie wegsyfer nie. Baie areas word oorstroom en ‘n moerasagtige oppervlakte is die gevolg. Die reënval in die streke is maar ongeveer 250 mm per jaar en die verdampingsyfer is baie laag. Water kry dus nie kans om behoorlik af te loop nie.
  • Die toendraplantegroei moet dus aangepas wees by baie lae temperature en ‘n oormaat water. Plante groei baie vinnig. Hulle word skielik in die somer wakker en groei dan oornag. Mosse, kosmosse, varings, klein bossies, gras en selfs blomme verskyn. Die dierelewe is goed aangepas by die natuur. Rendiere, wolwe en bere is die bekendste voorbeelde.
  • Die area is baie yl bevolk. Die Eskimo’s van Groenland is ‘n voorbeeld van die nomadiese groepe wat hier woon.
  • Die Yswoestyne is die onherbergsame gebiede wat Antarktika (sesde kontinent), groot dele van Groenland, die Noordelike Ysseegebiede en bergtoppe wat altyd met sneeu bedek is, insluit. Hierdie yswoestyne is nie deel van die Toendrabioom nie.
  • Hierdie gebiede is so koud dat byna geen plantegroei voorkom nie. Landdiere is ook byna afwesig, maar seediere soos ysbere, walvisse, robbe en see-olifante is volop. Verskillende voëlsoorte het hul broeikolonies in dié areas.

Aktiwiteit 6:

Om navorsing oor antarktika te doen en dan die klimaat-toestande van yswoestyne te beskryf

[lu 1.5]

Beskryf die klimaattoestande van die yswoestyne nadat jy navorsing oor Antarktika gedoen het.

Assessering

Leeruitkomstes(LUs)
LU 1
AARDRYKSKUNDIGE ONDERSOEKDie leerder is in staat om ondersoekvaardighede te gebruik om aardrykskundige en omgewingsbegrippe en -prosesse te ondersoek.
Assesseringstandaarde(ASe)
Dit is duidelik wanneer die leerder:
1.1 inligtingsbronne , insluitend eenvoudige statistiek, identifiseer om die vraag oor ‘n maatskaplike of omgewingsvraaagstuk of –probleem te help beantwoord;
  • relevante inligting vir spesifieke doeleindes uit bronne kies en dit opteken;
  • breedte- en lengteligging gebruik om relevante plekke op kaarte te vind;
  • inligting gebruik om oplossings vir probleme voor te stel;
1.5 verslag doen oor ondersoeke deur bespreking, debat, gestruktureerde skryfwerk, grafieke, tabelle, kaarte en diagramme.
LU 2
AARDRYKSKUNDIGE KENNIS EN BEGRIPDie leerder is in staat om aardrykskundige en omgewingskennis en -begrip te toon.
Dit is duidelik wanneer die leerder:
  • kan verduidelik waarom meer mense op sommige plekke woon as ander;
  • kan identifiseer hoe toegang tot verskillende soorte hulpbronne ontwikkeling op verskillende plekke beïnvloed;
  • sommige maniere waarop die samelewing die omgewing verander het, beskryf.

Memorandum

Sirkelgrafiek:

  • Woude
  • Gras

Questions & Answers

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
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
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 6. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10999/1.1
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