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AARDRYKSKUNDE

Graad 4

VOEDSELPRODUKSIE

Module 20

DIE VERHAAL VAN VOEDSEL

Die verhaal van voedsel

Voedsel speel ‘n baie belangrike rol in ons daaglikse lewe. Ons eet om te groei, gesond te wees en aan die lewe te bly. Daar is ook mense wie se hele lewe om kos draai – hulle lewe net om te eet!

Voordat ons kyk hoe voedsel in die 21 ste eeu geproduseer word, is dit belangrik om te

weet hoe ons voorvaders hulle borde van dag tot dag met kos gevul het.

Aktiwiteit 1

Om die sketse te bestudeer en dan die ontbrekende woorde in die paragraaf in te vul en sodoende die storie van kos te voltooi [lu 2.3]

1
2
3
4
5

(Moontlike antwoorde : ruil ; jagters ; veewagters ; bolle en knolle ; ploeg ; vleis ; boere ; vrugte en sade)

Honderde jare gelede het die kos wat mense geëet het, baie verskil van dit wat ons vandag geniet. Eers was mense .........................................-versamelaars wat van plek tot plek agter wild aangetrek het om sodoende hulle kos te bekom. Hulle het in tydelike skuilings gebly en wanneer die wild min geraak het, verder getrek. Die vleis is aangevul met .......................................... wat hul gepluk het en .................................. wat hul uitgegrawe het. Drinkwater is verkry deur van reën of dou op te vang of uit riviere en damme te skep.

Die jagters het later hulle eie troppe skape, beeste en bokke begin versamel en makgemaak en sodoende .............................. geword wat met hul eie vee agter beter weivelde aangetrek het. Nou het hul melk en ...................................... gehad en was dit nie meer nodig om te jag nie.

Die veewagters het ............................................. geword wat verkies het om op een plek te bly en hul koring te verbou van die saad van wilde grasse. Die mense het in klein groepe naby vars water gebly en gou is die ................................... ontwerp om die boere te help met die bewerking van die grond. Hulle het ook beter metodes ontwikkel om water tot by hul landerye te kry (besproeiing). Van die gemeenskappe het groter geword en daar is geëksperimenteer met verskillende landbougewasse, soos mielies, sorghum, pampoene, botterskorsies, wilde waatlemoene, ens.

Deel van die oeste is gebêre om kos vir die hele jaar te hê terwyl ander weer na naburige dorpies geneem is om dit te ........................... vir ander kos of produkte.

Namate tegnologie ontwikkel het, het die boerderymetodes ook baie verander. Destyds se houtploeë is vervang met ysterploeë en word nie meer met die hand gestoot nie maar wel met lugverkoelde trekkers wat tot twintig ploeë op een slag kan trek.

Assessering

LEERUITKOMS 2: AARDRYKSKUNDIGE KENNIS EN BEGRIP

Die leerder is in staat om aardrykskundige en omgewingskennis en -begrip te toon.

Assesseringstandaard

Dis duidelik wanneer die leerder

  • kan beskryf hoe daar in die verlede in basiese menslike behoeftes voorsien is en hoe dit in die hede gebeur [mense en omgewing].

Memorandum

Die verhaal van voedsel

  • Jagter
  • Vrugte en sade
  • Bolle en knolle
  • Veewagters
  • Vleis
  • Boere
  • Ploeg
  • Ruil

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
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
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
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali 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 4. OpenStax CNX. Oct 21, 2009 Download for free at http://cnx.org/content/col11083/1.2
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