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Natuurwetenskappe

Die aarde en daarbuite

Die sterre

Opvoeders afdeling

Memorandum

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

Inhoud

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.

VIND UIT

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.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Assessering

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

where we get a research paper on Nano chemistry....?
Maira Reply
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
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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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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