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Natuurwetenskappe

Graad 4

Die planeet aarde en die heelal

Module 41

Die sterre en planete

Aktiwiteit:

Om inligting oor sterre en planete te versamel sodat ons modelle kan bou en oor planete kan gesels

[lu1.2, 2.1]

Ons hoor baie die uitdrukking: “Sjoe, jy’s ‘n ster!” Dit beteken dat jy iets baie goed gedoen het en dat jy behoorlik uitgeblink het. Dis wonderlik om met ‘n ster vergelyk te word, want sterre bekoor mense, hulle blink en hulle is baie mooi.

Sterre word dikwels in patrone gegroepeer, bv. die mense wat suid van die ewenaar woon, kan die Suiderkruis baie duidelik op ‘n helder aand sien. Op ‘n donker aand kan die melkweg-sterrestelsel weer duidelik gesien word. Maar hoe ontstaan ‘n ster?

Daar is baie gas- en stofwolke in die heelal.

Soms word die gas- en stofdeeltjies bymekaar getrek, en soos dit vermeerder, word dit baie warm, warmer as 1 000 000 grade Celsius.

Heliumgas word nou gevorm, en wanneer dit gebeur, word ‘n baie groot hoeveelheid energie en lig vrygelaat.

Die massa gas en stof begin nou blink, as ‘n ster!

Daar is nege planete wat rondom die aarde wentel. Hulle is almal verskillende groottes, neem verskillende aantal dae of jare om om die son te wentel, en is almal verskillende afstande van die son af.

Wat is die antwoorde op die volgende stellings?

1. Die enigste planeet met lewe op.

2. Die naaste planeet aan die son.

3. Daar is duidelike sirkels, wat moontlik uit yskristalle bestaan, om hierdie planeet.

4. Die grootste planeet.

5. Die planeet wat die aand- en môrester genoem word.

6. Die kleinste planeet.

7. Die planeet met die rooierige kleur.

8. Hierdie planeet het dun, donker ringe om hom.

9. Die tweede verste van die son af.

Die naaste planeet aan die son is Mercurius, dan Venus, Aarde, Mars, Jupiter, Saturnus, Uranus, Neptunus en Pluto. Jupiter is die grootste planeet (143 000 km in deursnee), en Pluto is die kleinste (2 500 km in deursnee). Venus is die naaste planeet aan die aarde. Soms sien ons Venus as die Aandster en die môrester. Mars het amper ‘n rooierige kleur.

1. Neem ‘n boek oor planete uit en doen navorsing oor die planete. Skryf die name van al die planete op ‘n driehoekige stukkie papier en maak dit vas op ‘n stokkie sodat dit soos ‘n vlaggie lyk. Maak ook een vir die son. Gaan na die speelterrein en druk die sonvlaggie eerste in die grond of in die gras. Pak nou die ander planete om die son soos dit hoort, bv. Mercurius is die naaste aan die son, ens.

2. Knip sirkels uit met die name van al die planete daarop en hang hulle onder mekaar in die korrekte volgorde, met die son heelbo, aan ‘n hanger. Verbind hulle met enigiets wat goed kan hou. Hang dit iewers in die klas op.

Assessering

LEERUITKOMS 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.

  1. Assesseringstandaard

Dis duidelik wanneer die leerder

  • ondersoek uitvoer en data versamel.

LEERUITKOMS 2: KONSTRUKSIE VAN WETENSKAPKENNIS Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

  1. Assesseringstandaard

Dis duidelik wanneer die leerder

  • betekenisvolle inligting onthou.

Memorandum

Antwoorde op stellings:

  1. Aarde
  2. Mercurius
  3. Saturnus
  4. Jupiter
  5. Venus
  6. Pluto
  7. Mars
  8. Uranus
  9. Neptunus

Mnr. Breinsel:

  • Vind uit wat beteken die woord planeet.

Antwoord:

  • wandelaar.

Questions & Answers

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
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
How can I make nanorobot?
Lily
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
how can I make nanorobot?
Lily
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
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Source:  OpenStax, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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