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As die deursnit van die son in die notasie 1,5 x 10 6 geskryf word, hoe sou jy die AU se notasie skryf?

5. Wat is die deursnit van ons sterrestelsel dus?

Assessering van berekeninge:

Was jou berekenings korrek?

[LU 2.4]

Het jy geweet?

Die grootste struktuur in die heelal is bekend as “the great wall” – ’n kombers van sterrestelsels wat 500 miljoen ligjare lank en 16 miljoen ligjare dik is.

  • Ons sterrestelsel is een van biljoene sulke reusestergroepe of sterrestelsels! Dit is maar sover ons met ons grootste en sensitiefste teleskope kon vasstel.
  • Die naaste volgende sterrestelsel aan ons is die ANDROMEDA- sterrestelsel. So ’n sterrestelsel bestaan uit groepe of bondels sterre.
  • Tussenin is daar reusewolke van gas en partikels wat ons nebulae noem. Hulle is die geboorteplekke van sterre.
  • Die teorie is dat ’n warm wolk gasse – die solar nebula - vier en ’n half biljoen jaar gelede om ’n nuutgevormde son gedraai en begin afkoel het. Tydens die afkoeling is biljoene druppeltjies gevorm wat aan mekaar begin vaskleef het. So is planete gevorm.
  • Dit het egter nog ’n halfbiljoen jaar geneem om genoegsaam af te koel en ’n kors te vorm.

Aktiwiteit 4:

Om definisies neer te skryf

1. ’n Ligjaar is

2. Die Melkweg is

3. Die Andromeda is

4. ’n Nebula is

5. Die rede vir die gebruik van eenhede soos ligjare en AU is

Assessering van definisies:

Was jou definisies korrek?

[LU 2.4]

Assessering

LU 1

Wetenskaplike Ondersoek

Die leerder is in staat om met selfvertroue op weetgierigheid oor natuurlike verskynsels te reageer, en om binne die konteks van wetenskap, tegnologie en die omgewing verbande te ondersoek en probleme op te los.

Dit word bewys as die leerder:

1.1 ondersoeke beplan;

1.2 ondersoeke uitvoer en data versamel;

1.3 data evalueer en bevindinge kommunikeer.

LU 2

Konstruksie van Wetenskapkennis

Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewings- kennis toe.

Dit word bewys as die leerder:

2.1 betekenisvolle inligting kan oproep;

2.2 inligting kan kategoriseer;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

LU 3

Wetenskap, die Gemeenskap en die Omgewing

Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Dit word bewys as die leerder:

3.1 wetenskap as ’n menslike aktiwiteit verstaan;

3.2 die volhoubare gebruik van die aarde se hulpbronne verstaan.

Memorandum

AKTIWITEIT: VRAE

1. geen materie – een balletjie kleiner as ’n atoom; daarna ’n brousel van deeltjies en kragte

2. superkrag waarmee kleiner balletjie in materie uitgebars het

3. ’n klomp kwarks was saamgepers om waterstof te vorm

4. ’n subatomiese partikel

5. a) He-atome se samevoeging

b) C-atome onder hewige temperature

6. Swaartekrag, elektromagnete, sterk kernkragte en swak kernkragte

7. teenoorgestelde van materie – kanselleer materie uit

AKTIWITEIT: BEREKENING

1. 10 miljoen miljoen kilometer

2. ongeveer 2 biljoen

3. 10 18

4. 150 x10 6

5. 100 000 x 300 000

AKTIWITEIT: DEFINISIES

1. die afstand wat lig in een aardse jaar aflê teen ’n snelheid van 300 000 km.s -1

2. versameling van biljoene sterre waarvan ons son een is

3. naaste volgende sterrestelsel

4. reuse gaswolke tussen sterrestelsels

5. om getal denkbaar te maak

Questions & Answers

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
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
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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