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Sosiale wetenskappe: aardrykskunde

Graad 6

Klimaat en plantegroeistreke van die wêreld

Module 9

Die hoofbiome

1. Die Hoofbiome (Plantegroeistreke)

  • Die plantegroei van die wêreld is in vyf groot biome verdeel:
  1. Die Woudbioom
  • Tropiese woude.
  • Gematigde woude.
  • Bladwisselende woude.
  • Naaldwoude.
  • Mediterreense woude (Sclerophyll-bosse)
  • Savannebioom
  • Grasveldbioom
  • Woestynbioom
  • Toendra en ysveldbioom

Onthou!

Op talle plekke op aarde is die oorspronklike omgewing reeds gewysig of vernietig deur die mens.

2. Oppervlakverdeling van verskillende biome

Aktiwiteit 1:

Om ‘n sirkelgrafiek te teken en die biome se omvang daarop voor te stel

[lu 1.5]

Gebruik die tabel as verwysing.

Hoofbiome van die wêreld
Bioom Oppervlakte(miljoene km 2 ) Persentasie
Woude 52,3 40,1
Savanne 21,8 16,7
Grasvelde 8,8 6,8
Woestyne 33,8 25,9
Toendra 13,7 10,5

Teken ‘n sirkelgrafiek en dui daarop aan watter deel (segment) van die hele sirkel (360 o ) elke bioom beslaan. Gebruik die persentasie van elke bioom om dit te bepaal. Gebruik ‘n gradeboog om elke bioom as ‘n sektor van die sirkel in te teken.

My sirkelgrafiek van die verskillende biome van die wêreld

Bereken die segment in grade soos volg:

Woude : 40 , 1 100 size 12{ { {"40",1} over {"100"} } } {} × 360 1 size 12{ { {"360"} over {1} } } {} = 144,36 o
Savanne :
Grasvelde :
Woestyne :
Toendra en ysvlaktes :
  • Watter bioom bedek die grootste oppervlakte?
  • Watter bioom bedek die kleinste oppervlakte?

DIE WOUDBIOOM

  • ‘n Woud is ‘n groot stuk grond wat natuurlik met bome bedek is. In sekere woude sluit die hoë boomkruine dig teen mekaar aan en verhoed dat die sonstrale tot op die grond kan deurdring. Op ander plekke is die bome wyer uitmekaar en sonlig word gedeeltelik deurgelaat.
  • Die belangrikste van die soorte woude is die tropiese reënwoud . Hierdie woude word naby die ewenaar (in die trope) gevind waar dit die hele jaar warm is, met ‘n baie hoë reënval. Die meeste van die soorte bome in die tropiese reënwoude is breëblaar-, immergroen bome. Ons vind ook baie soorte palms en varings hier. Daar woon relatief min mense in tropiese reënwoude, omdat die plantegroei so dig is dat dit moeilik is om in die woude te beweeg.
  • In die bladwisselende woude met boomsoorte soos eik, okkerneut, wilg en populier, verloor die bome hul blare gedurende die winterseisoen, terwyl gematigde immergroen woude in gebiede met reën dwarsdeur die jaar byvoorbeeld baie dennebome het wat as gevolg van die feit dat hul dennebolle dra, boldraende (keëldraende) bome genoem word. In hierdie tipe woude vind ons baie verskillende soorte insekte, reptiele, spinnekoppe en voëls. Die bladwisselende en gematigde woude kom voor in gebiede wat van die digsbevolkte in die wêreld is (Noord-Amerika, Europa en Asië). Deur die eeue was mense nog altyd afhanklik van woude vir skuiling, kos, hout vir huise, wapens en energie.

Aktiwiteit 2:

Om die uitwerking van digte bevolking op natuurlike woude te bespreek

[lu 1.1]

Bespreek in julle groepe die uitwerking wat die digte bevolking op die natuurlike woude kan hê en hoe die natuur beskerm kan word. Skryf ‘n kort verslag na aanleiding van jou groep se bevinding.

Naaldwoude kom hoofsaaklik tussen 50°N en 70°N voor en is aangepas om die lang, koue winters en kort somers te oorleef.

Questions & Answers

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
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
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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