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Natuurwetenskappe

Planeet aarde en die heelal

Ons eie ster - die son

Opvoeder afdeling

Memorandum

Opdrag 3:

Hubble-ruimteteleskoop : Dit is ‘n instrument wat sterrekundiges in staat stel om heelwat meer van die heelal te sien as met die blote oog. Die Hubble-ruimteteleskoop is die grootste een in die ruimte. Hierdie teleskoop is in 1990 in die VSA gelanseer.

Satelliete : Daar word onderskei tussen natuurlike satelliete en mensgemaakte satelliete. Natuurlike satelliete is hemelliggame wat om ander hemelliggame wentel. Planete is satelliete van die son. Kunsmatige of mensgemaakte satelliete is instrumente wat ontwerp is om ruimte-inligting na die aarde te stuur. Hierdie satelliete word in ‘n wentelbaan om die aarde geplaas. Satelliete neem vasgestelde tye om hulle wentelbane te voltooi.

Robotverkentuie : Robotverkentuie is onbemande ruimtetuie. Dit kan op die maan of ander planete land en dit van naderby bekyk. Ruimtepeilers is robot-ruimtetuie wat om planete wentel om dit te verken, maar hulle land nie op die planete nie.

Leerder afdeling

Inhoud

Aktiwiteit: om die eienskappe van die son te ondersoek en konsepte soos konstellasies en ruimteverkenning te verduidelik” [lu 1.2]

  • Die son is ‘n gewone ster in die Melkweg (Aarde se sterrestelsel). Dit is ‘n ontsaglike groot draaiende bol gas met ‘n deursnee van 1,4 miljoen km. Dit is meer as 100 keer groter as die aarde se deursnee. Die son is 150 miljoen km van die aarde en dit duur 8 minute voordat die lig van die son se oppervlakte ons bereik.
  • Die son ontwikkel soveel energie dat sy oppervlak witgloeiend is met ‘n temperatuur van 6 000 grade Celsius. Die energie ontstaan by die middelpunt van die son as gevolg van kernreaksies. Die son skyn reeds ongeveer 4,5 miljard jaar lank. Na nog 5 miljard jaar sal die son se voorraad waterstofgas opgebruik wees.
  • Die son is noodsaaklik vir lewe op Aarde. Dit verskaf feitlik al die energie wat tot ons beskikking is. Selfs die steenkool wat ons verbrand, was oorspronklik lewende woude wat aan die groei gehou is deur energie van die son. Geen lewe op Aarde kan voortbestaan as die son ophou skyn nie.
  • Die heelal is so groot dat sterrekundiges dit in ligjare meet. ’n Ligjaar is die afstand wat lig in een jaar aflê—9,5 miljoen km. Lig beweeg teen 300 000 km per sekonde.

Konstellasies

  • Sterrekundiges het die sterre in konstellasies opgedeel. Die eerste sterrekundige wat die Suiderkruis vanaf Suid-Afrika ondersoek het, was Guy Tachard in 1685. Die konstellasie verskyn op die vlag van Nieu-Seeland en Australië.

  • Die drie sterre in die Orion-gordel lê in ‘n reguit lyn. Dit is seker die konstellasie wat die maklikste in die Suidelike Halfrond uitgeken kan word. Orion is vernoem na ‘n jagter uit die Griekse mitologie. Van die sterre vorm sy swaard.

OPDRAG 3

  • Die teleskoop is ‘n instrument waarmee sterre bestudeer word. Groot teleskope word in spesiale geboue, sterrewagte genoem, opgerig. Ruimteverkenning sou nie moontlik gewees het sonder teleskope, satelliete en ander onbemande ruimtetuie nie.

Skryf ‘n kort paragraaf (6 -10 reëls) oor elkeen van die volgende onbemande ruimtetuie:

  • Hubble-ruimteteleskoop
  • Satelliete
  • Robotverkentuie

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Kriteria vir assessering van paragrawe

Vlak 4 Vlak 3 Vlak 2 Vlak 1
Beplanning, samehang en struktuur: deeglike beplanning; logies en effektief beplanning voldoende; korrekte sinstruktuur weinig bewyse van beplanning; foute in sinstruktuur geen bewys van beplanning nie; vele foute met sinstruktuur
Korrektheid van inligting: inligting korrek; uiters interessant; toon kreatiwiteit inligting korrek weergee inligting nie heeltemal akkuraat nie inligting wemel van feitelike foute
Aanbieding: uiters netjies, ordelik en kreatief aanbieding is ordelik en netjies aanbieding effe deurmekaar; onnet aanbieding geensins gestruktureerd; onnet

Assessering

Leeruitkomste 1: 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.

Assesseringstandaard 1.2: Dit is duidelik wanneer die leerder ondersoeke uitvoer en data versamel: organiseer en gebruik toerusting of bronne om inligting te versamel en aan te teken.

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
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Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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