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Class notes

Class notes Natuurwetenskap

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Die dokumente bevat opsommings van kwartaal 3 en 4. Dit is in vraag en antwoord formaat en leerders leer soveel makliker met hierdie tegniek. Die opsommings is kleurvol, maklik om te leer en eenvoudig.

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  • October 28, 2024
  • 15
  • 2024/2025
  • Class notes
  • Aimee goss
  • Kwartaal 3+4
  • 200
avatar-seller
Gossclass Opsommings©



NATUURWETENSKAP
Graad 8, Kwartaal 4
Aarde en die ruimte
Eenheid 1: Die Sonnestelsel
Die son:

1. Wat is die naaste ster aan die aarde?
 Die son.
2. Wat is die grootste voorwerp in ons sonnestelsel?
 Die son.




 Ster naaste aan die aarde.
 Hoofbron van energie
 Waterstofgas word na heliumgas
omgeskakel
 Donker kolle is sonvlekke




3. Hoeveel keer groter is die massa van die son as teenoor die aarde?
 Die massa van die son is ongeveer 333 000 keer die grootte van
die massa van die aarde.
4. Waaruit bestaan die son?
 Uit n bal brandende gasse wat lig en hitte afgee.
5. Waarvan is die son se energie afkomstig?
 Van kragtige kernreaksies wat ook kerfusie genoem word.
6. Wat is die sonvlekke op die son?
 Dit is groot donker kolle op die son.


1

, Gossclass Opsommings©


7. Hoe word die sonvlekke op die son veroorsaak?
 Deur ingewikkelde interaksies met die son se magneetveld.
8. Wat is die temperatuur van n sonvlek?
 Ongeveer 3 800 kelvin (K).
9. Wat is die son se oppervlaktemperatuur?
 Ongeveer 5 800 kelvin (K).
10. Wat is die temperatuur van die son se kern?
 Ongeveer 15, 6 miljoen kelvin (K).
11. Watter eenheid gebruik wetenskaplikes om temperatuur te meet?
 Wetenskaplikes gebruik kelvin (K) om temperatuur te meet, nie
grade Celcius (◦C) nie.
12. Watter element is die ligste element?
 Waterstof.
13. Hoeveel % bestaan die son uit waterstof, helium en ander gasse?
 74, 5% waterstof.
 24, 5% helium.
 1% ander gasse soos metale.
14. Noem 6 goed wat rondom die son wentel?

8
Planete

Dwerg-
Komete planete

Voorwerpe
wat
rondom die
son wentel:

Meteoriete Mane



Asteroïdes




2

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