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Toe Tyd Begin Het

  • Aan die begin, toe daar nog geen heelal was nie, was daar ook nie tyd nie. Die teorie is dat die begin van alles soos volg verloop het:
Tyd Gebeure
0 Sekondes
  • Heelal begin as klein warm balletjie
10 -35 sekondes
  • Ruimte swel uit teen ’n duisend biljoen biljoen biljoen keer per sekonde
10 -32 sekondes
  • Ruimte word oorstroom met energie en materie soos kwarks
10 -8 sekondes
  • Materie en antimaterie ontstaan
3 minute
  • Kwarks smelt saam en vorm waterstof en helium
1 miljoen jaar
  • Gaswolke vorm lang stringe
300 miljoen jaar
  • Stringe wolke vorm wat sterre en sterrestelsels vorm

Aktiwiteit 2:

Om jou kennis te toets

1. Waaruit het die heelal aan die begin bestaan?

2. Wat is die “Oerknal” of “Big Bang”?

3. Hoe het die eerste elemente ontstaan?

4. Wat is ’n kwark?

5. Hoe het die volgende elemente ontstaan?

a) Be

b) Fe

6. Noem die vier belangrikste kragte in die heelal?

7. Wat is antimaterie en wat gebeur as dit naby materie kom?

Assessering van begrip ten opsigte van die teorie oor die ontstaan van die heelal:

Verstaan jy die teorie?

[LU 2.3]

Om ‘n opdrag oor teleskope te skryf

Skryf ’n projek van vier bladsye oor die gebruik van teleskope en die basiese bou daarvan. Lewer in op ’n datum soos bepaal deur jou opvoeder.

  • Vind meer uit spesifiek oor die volgende:
  • Hubble-teleskoop
  • Mcmath-sonteleskoop in Arizona, VSA
  • Reuse radioteleskoop – die Arecibo – in Puerto Rico
  • Die SAAO in Sutherland, Suid-Afrika
  • Die SALT (Southern African Large Telescope) by Sutherland wat in 2004 voltooi is
  • Die radioteleskope by Hartbeeshoek, Gauteng
  • Die SKA
  • Sluit jou verslag af met ’n oorsig oor die waarde van die teleskope vir die wetenskap.[LU 1.1; LU 1.2; LU 1.3; LU 3.1]

Die Sterrestelsels – “Galaxies”

  • Ons son is slegs een van ’n massiewe versameling van ongeveer twee biljoen sterre wat in die vorm van ’n gebakte eier met ’n deursnit van 100 000 ligjare in die hemelruim lê! As jy saans opkyk na die hemelruim en ’n ligband van fyn sterretjies sien, kyk jy na die Melkweg . Dit is eintlik net ’n blik op die randjie van ons sterrestelsel! Die Griekse woord “galakta” beteken “melk”.
  • Die aarde lê sowat 300 000 ligjare weg van die middel van ons sterrestelsel.
  • ’n Ligjaar is een van die belangrikste EENHEDE in die ASTRONOMIE wat jy moet ken. Wetenskaplikes gebruik sulke eenhede omdat m en km onsinnig raak in die wye uitspansel met die groot afstande.

Aktiwiteit 3:

Om afstand in ligjare te bereken

  • ’n Ligjaar = die afstand wat lig in een aardse jaar aflê, indien dit beweeg teen ’n snelheid van 300 000 km/s -1

1. Bereken: ’n ligjaar

  • 365,25 dae x 24 uur x3 600 sekondes x 300 000 km/s -1 = ......................................
  • Dus: .................................................. kilometer
  • Miljoen, biljoene en triljoene?
GETAL 10 N NAAM VOORVOEGSEL
1 000 000 10 6 MILJOEN MEGA
1 000 000 000 10 9 BILJOEN GIGA
1 000 000 000 000 000 10 15 TRILJOEN PETA

2. Hoeveel sterre is in ons hemelruim?

3. Druk 10 biljoen biljoen uit as ’n getal (dit sou die voorvoegsel exa hê).

4. Nog ’n belangrike eenheid is die ASTRONOMIESE EENHEID (AU) wat die afstand van die son na die aarde voorstel, naamlik 150 miljoen kilometer .

Questions & Answers

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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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
Daniel
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
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
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.
Tarell
what is the actual application of fullerenes nowadays?
Damian
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.
Tarell
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.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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
Do you know which machine is used to that process?
s.
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natuurwetenskappe graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11068/1.1
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