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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

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
hey
Giriraj
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
ya I also want to know the raman spectra
Bhagvanji
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 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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