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Sosiale wetenskappe: geskiedenis

Graad 8

Grond en mag

Module 6

Die industriële rewolusie : landbou

Die Industriële Revolusie: Landbou

Op die verbetering in vervoer en paaie, het verstedeliking, toename in bevolking en ‘n styging in die lewenstandaard van die mense gevolg. Om meer en beter voedsel te voorsien aan die groeiende bevolking, was ‘n uitdaging vir die landboubedryf.

Robert Bakewell het in Dishley, in die streek Leicester, met skape en beeste geboer. Hy het besef dat vleisproduksie net voldoende sou wees indien die hoeveelheid en die kwaliteit daarvan kon verbeter. Die diere moes gouer markgereed wees en slegs tevrede kopers verseker die beste markpryse. Die gewildste wolskape was op hierdie stadium maer, langbeenskape wat met min kos kon klaarkom.

Bakewell het na eksperimentering ‘n skaap met ‘n groot karkas en baie goeie vleis geteel, wat binne twee jaar markgereed was. Hierdie ras, bekend as die Nuwe Leicesters was dus dubbel so winsgewend as die vorige skaapras wat eers na drie of vier jaar markgereed was. Bakewell was een van die eerste boere wat die waarde van wetenskaplike en gekontroleerde besproeiing van gewasse besef het. Hierdie navorsing was noodsaaklik omdat vleisproduksie nou belangriker geraak het as handel met wol of skaapvelle. Bakewell se eksperimentering met skaaprasse het dus gelei tot navorsing in dierevoer. Ook in beesteling het hy gekonsentreer op eienskappe soos kwaliteit (gehalte) en kwantiteit (hoeveelheid) ten opsigte van vleisproduksie. Sy eksperimentering is nog verder uitgebrei tot ‘n kleiner karperd wat nuttiger was as die groter diere.

  • Kyk na die volgende DIAGRAM van vleisproduksie te koop aangebied by die Smithfield-mark.
1710 1795
Skape 12 kg 35 kg
Beeste 150 kg 360 kg
  • Bestudeer die diagram op die vorige bladsy en antwoord dan die volgende vrae:

1. Het die skaapvleisproduksie vermeerder? Bewys jou antwoord.

2. Het die skaapvleisproduksie meer toegeneem as die beesvleisproduksie?

Bewys jou antwoord.

3. Kan jy van hierdie diagraminligting aflei dat die Britte meer van beesvleis as van skaapvleis gehou het? Verstrek minstens EEN rede vir jou antwoord.

LU 1 AS 1.3

Hoe lyk wetenskaplike navorsing en eksperimentering in die landbou vandag?

Wat is kloning?

  • Dit is ‘n produk van biotegnologie, waardeur selle of ‘n hele dier vervaardig word deur DNA van een ouerdier te gebruik, sonder dat die gewone normale geboorte- en/of groeiproses gevolg word. Die kloon het dan dieselfde DNA as die ouer.

Is kloning onnatuurlik?

  • Nee, klone word dikwels op natuurlike manier geproduseer as identiese tweelinge.

Werk die kloningsproses elke keer?

  • Nee, die skaap Dolly was die eerste geslaagde soogdierreproduksie. Dolly is gemaak van ‘n normale volwasse sel, in hierdie geval uit die uier van ‘n ooi. Meer as 200 pogings om Dolly te maak het misluk .

Is klone normale, gesonde diere?

  • Bokke, skape, koeie en muise is reeds gekloon. Dolly blyk gesond te wees, maar wetenskaplikes vermoed dat gesondheidsprobleme en vroeë veroudering by die klone kan voorkom.

Waar kry ‘n mens meer inligting oor die nuutste tegnologie?

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
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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
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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, Geskiedenis graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11043/1.1
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