<< Chapter < Page Chapter >> Page >

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

are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
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 6. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10999/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Aardrykskunde graad 6' conversation and receive update notifications?

Ask