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Aardrykskunde

Graad 4

Voedselproduksie

Module 25

Die visbedryf

As jy na die kaarte van Suid-Afrika kyk, sien jy dat ons land aan drie kante met see omring is. Suid-Afrika het ‘n baie lang kuslyn, van Alexanderbaai in die noordweste tot by Kosibaai aan die noordoostelike kus van Kwazulu-Natal. Baie mense in Suid-Afrika maak dan ook ‘n bestaan uit visvangs.

VISVANGGEBIEDE IN Suid-Afrika

  • Groter visse soos snoek en kabeljou word met handlyne van bote af gevang, terwyl ander diepseesoorte soos sardyne en stokvis met nette wat agter die bote gesleep word, gevang word.
  • Die see is ‘n baie groot bron van voedsel en byna 30 000 mense maak jaarlik ‘n bestaan uit die visbedryf van Suid-Afrika. Baie mense beoefen ook vissery as sport. Behalwe vir die seewatervisse is daar ook kleiner hoeveelhede vars visse wat daagliks in heerlike geregte op ons tafels verskyn.

Kan jy drie redes in hierdie twee paragrawe vind waarom die visbedryf belangrik is vir ons land?

Aktiwiteit 1

Om soveel voorbeelde moontlik in die volgende tabel in te vul [lu 1.2]

Vis as Voedsel
Seewatervisse Varswatervisse
Aktiwiteit 2: Om ‘n vloeidiagram oor die prosesse in die produksie van vis te voltooi [LU 1.1]
  • Bestudeer die volgende sketse en voltooi die diagram.

Prosesse in die produksie van vis

(vloeidiagram)

Assessering

Leeruitkoms 1: aardrykskundige ondersoek

Die leerder is in staat om ondersoekvaardighede te gebruik om aardrykskundige en omgewingsbegrippe en -prosesse te ondersoek.

Assesseringstandaard

Dis duidelik wanneer die leerder

1.1 inligting uit verskillende bronne identifiseer (kaarte) [vind bronne];

1.2 inligting uit bronne onder hofies organiseer.

Memorandum

Die prosesse in die produksie van vis

  • Vis word gevang deur verskillende metodes bv. treknette; handlyne.
  • Vis word geweeg, skoongemaak en verkoop.
  • Vis word na fabrieke (industrieë) vervoer waar dit verwerk word.
  • Vis word verwerk tot produkte soos visolie; viskoekies; visvingers; vars vis vir bak of braai.

Questions & Answers

so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
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
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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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