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Die aarde en daarbuite

Die sterre

Opvoeders afdeling


1. Ster: Hemelliggaam wat lig uitstraal. Bestaan hoofsaaklik uit helium en waterstof wat brand.

Planeet: Lewelose hemelliggaam wat sy lig van die son ontvang.

2. Kyk p.2 in die module.

Leerder afdeling


Die oermens het die bewegings van sterre en planete in mites en legendes probeer verklaar. Die antieke Grieke was meer wetenskaplik, maar selfs hulle het verkeerdelik geglo dat die aarde die middelpunt van die heelal was.

Slegs sedert ‘n paar honderd jaar gelede het ons besef dat die aarde ‘n baie klein, nietige stippeltjie is. Ons klein planeet draai om die son, wat op sy beurt slegs een van die ongeveer 100 000 miljoene sterre in ons sonnestelsel is en ons weet nou dat daar bowendien nog minstens 1 000 miljoen ander sterrestelsels bestaan.

Aktiwiteit: om die gebruik van sterre en planete by die ontwikkeling van kalenders te kan bespreek [lu 2.1]

Die Christenkalender

  • Hierdie kalender gebruik die son as hooftydhouer. Een jaar is dus 365¼ dae lank - die presiese lengte wat dit neem vir die aarde om een maal om die son te draai. Die beginpunt van die Christelike kalender is die geboorte van Jesus Christus. Jare voor die gebeurtenis word voor Christus of vC genoem, en die jare na sy geboorte staan bekend as na Christus of nC.
  • Hierdie kalender word die algemeenste oor die wêreld gebruik (ook deur nie-Christene).

Die Moslemkalender

  • Die Moslemgemeenskap gebruik die maan as sy tydhouer. (Die maan is stil en leweloos en maak geen lig van sy eie nie, maar weerkaats slegs die lig van die son. Die maan is dus nie ‘n ster nie.) ‘n Jaar is 354 of 355 dae en daarom word daar in 30-jaar siklusse gewerk.

Die Joodse Kalender

  • Die Jode gebruik in hulle kalender die maan om die dae en maande te tel en die son om die jare te tel. Die beginpunt is die Bybelse skepping van die aarde.
  • Hoewel die Joodse en Christenkalenders die son gebruik om die jare te tel, stem die datums van die Jode en Christene se nuwejaar nie ooreen nie.

Die Chinese Kalender

  • Die son en die maan word deur die Chinese gebruik as tydhouers. Hulle jare is 353, 354 of 355 dae lank en daarom word jaarsiklusse gebruik: 60 jaar vorm die hoofsiklus met 12 jaar periodes binne die siklus: 12 jaar en ‘n dertiende skrikkeljaar elk. Elk van die jare is na ‘n verskillende dier vernoem.
  • Elke dier het eienskappe wat, soos die Chinese glo, oorgedra word aan diegene wat in daardie jaar gebore is.


1. Gebruik ‘n verklarende woordeboek of enige ander betroubare bron en vind uit wat is die verskil tussen ‘n ster en ‘n planeet.

Ster: _________________________________________________
Planeet: _________________________________________________

2. Beskryf hoe die kalenders van die Christene, Jode, Moslems en Chinese van mekaar verskil.









Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.1: Dis duidelik wanneer die leerder betekenisvolle inligting onthou.

Questions & Answers

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
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
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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 ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
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what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
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what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
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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
what is system testing
what is the application of nanotechnology?
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
anybody can imagine what will be happen after 100 years from now in nano tech world
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
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
how did you get the value of 2000N.What calculations are needed to arrive at it
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Source:  OpenStax, Natuurwetenskappe graad 6. OpenStax CNX. Sep 17, 2009 Download for free at http://cnx.org/content/col11080/1.1
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