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    This module and collection are included inLens: Siyavula: Natural Sciences (Gr. 7-9)
    By: Siyavula

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Om konseptuele kennis toe te pas, afleidings te maak en voorspellings te waag

Module by: Siyavula Uploaders. E-mail the author

NATUURWETENSKAPPE

Lewe en Lewenswyse

OPVOEDERS AFDELING

Memorandum

1. Elke organisme is by 'n bepaalde leefwyse aangepas. Sodoende kan baie organismes saam leef sonder om in alle opsigte te kompeteer.

2. Organismes verander voortdurend om beter by hul omgewing aan te pas.

3. Veranderinge in hul omgewing.

4. Die temperatuur is besig om te styg.

5. Nee. Sommiges gaan waarskynlik uitsterf.

6. Hulle sal moet aanpas by die veranderinge. Hulle vermoë om aan te pas, hang af van die graad en tempo van verandering in hul omgewing.

Uitsterwing van dinosourusse: Gesels met die leerders oor drastiese veranderinge soos die ystydperk, die spoed waarteen dit gebeur het, ensovoorts. Laat hulle inligting versamel en klas toe bring.

Die mens kan daartoe bydra deur die balans in die natuur te versteur, bv. deur die uitroei van woude, besoedeling, uitroei van bepaalde diersoorte.

LEERDER AFDELING

Inhoud

AKTIWITEIT: Om konseptuele kennis toe te pas, afleidings te maak en voorspellings te waag [LU 2.3, LU 2.4]

VERSKEIDENHEID EN VERANDERING

Jy weet nou dat daar ‘n wye verskeidenheid plante en diere in ekosisteme voorkom. Probeer die volgende vrae beantwoord:

1. Hoekom is daar ‘n verskeidenheid plante en diere (hoekom verskil plante van mekaar en hoekom verskil diere van mekaar)?

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2. Gaan die plante en diere wat vandag leef vir altyd onveranderd bly of gaan hulle mettertyd verander? Verduidelik jou antwoord.

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3. Wat veroorsaak dat plante en diere verander?

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4. Noem een nie-lewende faktor wat tans besig is om te verander en wat uiteindelik die aard van ekosisteme regoor die wêreld gaan laat verander.

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5. Gaan al die plante en diere die verandering oorleef? ________________________

6. Wat sal die plante en diere moet doen om die verandering te oorleef?

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Plante en diere verskil van mekaar omdat hulle aangepas het om onder bepaalde omstandighede te oorleef. As die omstandighede permanent verander, moet die plante en diere by die verandering aanpas. Die soorte wat daarin slaag om te verander, oorleef die verandering. Soorte wat nie kan verander nie, sterf uit.

Dinosourusse is voorbeelde van diere wat uitgesterf het.

Figure 1
Figure 1 (graphics1.png)

Probeer vasstel wat die verandering was wat die dinosourusse laat uitsterf het.

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Kan die mens daartoe bydra dat die omstandighede op aarde permanent verander? Beskryf.

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ASSESSERING

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

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder inligting interpreteer: interpreteer inligting deur kernidees in die teks te identifiseer, patrone in aangetekende data te vind en gevolgtrekkings te maak uit inligting in verskeie vorme (bv. prente, diagramme en geskrewe teks);

Assesseringstandaard 2.4: Dit is duidelik wanneer die leerder kennis toepas in ‘n variasie van ‘n bekende situasie: pas konseptuele kennis toe deur ‘n begrip wat onderrig is met ‘n variasie van ‘n soortgelyke situasie in verband te bring.

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