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Natuurwetenskappe

Die aarde en daarbuite

Die sterre

Opvoeders afdeling

Memorandum

  • Volg die aanwysings in die module:
  • Vraag 2 : Ja. Wes. Nee
  • Vraag 3: Gevolgtrekking: die sterre is elke aand vier minute vroeër bokant die baken – die beweging is weswaarts.

Leerder afdeling

Inhoud

Aktiwiteit: om die begrip konstellasies te kan bespreek en die beweging van sterre te ondersoek [lu 1.2, lu 2.3]

In antieke tye het sterrekundiges helder sterre in groepe wat patrone gevorm het, groepeer. Hierdie patrone word konstellasies genoem en is na mense, gode en diere vernoem. Elke konstellasie het ‘n Latynse naam. As gevolg van die omwenteling van die aarde om die son, verskyn verskillende konstellasies, verdwyn dan, en verskyn weer later gedurende die loop van ‘n jaar.

  • Daar bestaan “sterkaarte” vir die Noordelike, sowel as die Suidelike Halfrond. Konstellasies word verskillend op verskillende “sterkaarte” aangedui. Ons hoef ons egter nie daaroor te bekommer nie, want daar is nie ‘n “korrekte” manier om konstellasies te teken nie.

Die konstellasies van die suidelike halfrond

Beweging van sterre en konstellasies

  • As jy vir die eerste keer buitentoe gaan om na die konstellasies te kyk, mag dit vir jou onmoontlik lyk om enige konstellasie tussen die massa sterre in die hemelruim op te spoor. As jy egter een keer ‘n konstellasie gevind het, sal jy dit die volgende keer baie maklik opspoor.
  • Een van die dinge wat dit moeilik maak om sterre op te spoor is die feit dat die sterre die heeltyd “beweeg”. Hulle behou hul posisie ten opsigte van mekaar, maar hulle verskyn elke aand en hulle beweeg deur die lug gedurende die nag.
  • Sommige sterre skyn heelnag, terwyl ander verdwyn en nuwes hul plekke inneem. Hierdie beweging vind baie stadig plaas en jy sal dit nie opmerk as jy net na die sterre staan en kyk nie.

‘n Eksperiment om vas te stel of sterre beweeg

1. Kies ‘n helder ster of konstellasie, bv. die Suiderkruis, en staan êrens sodat die ster/konstellasie presies bokant ‘n vaste baken (bv. ‘n boom of die dak van ‘n huis) is.

2. Teken die tyd aan en keer een uur later na die PRESIESE posisie terug.

Het die ster/konstellasie beweeg?_________________________

Indien wel, in watter rigting (wes, noord, oos of suid)? ______________________

Het die ster/konstellasie se posisie t.o.v. ander sterre verander?

_____________________________________________________________________

3. Bestudeer die posisie van jou ster/konstellasie vir ‘n paar agtereenvolgende aande en teken telkens die presiese tyd aan wanneer dit jou baken bereik.

Aand 1 Aand 2 Aand 3 Aand 4 Aand 5
___:___ ___:___ ___:___ ___:___ ___:___

Skryf jou gevolgtrekking neer:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Assessering

Leeruitkomste 1: Die leerder is in staat om met selfvertroue op weetgierigheid oor natuurlike verskynsels te regeer, en om binne die konteks van wetenskap, tegnologie en die omgewing verbande te ondersoek en probleme op te los.

Assesseringstandaard 1.2: Dis duidelik wanneer die leerder ondersoeke uitvoer en data versamel.

Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.3: Dis duidelik wanneer die leerder inligting interpreteer.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, Natuurwetenskappe graad 6. OpenStax CNX. Sep 17, 2009 Download for free at http://cnx.org/content/col11080/1.1
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