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3. Hoekom is Mars nou so koud?

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4. Hoe sal dit voel om asem te haal op Mars?

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8.2 Temperature op Mars

Robotverkentuie het met ‘n termometer die volgende temperature oor twee dae op Mars gemeet:

Die horisontale as dui die tyd aan soos aan ons bekend op Aarde. Die 14 staan vir 14:00 (twee uur in die middag) en die 18 staan vir 18:00 (ses uur in die aand).

  • Die vertikale as dui die temperature in grade aan.

Beantwoord nou die volgende vrae:

1. Wat was die temperatuur om 21:00 gedurende dag 1?

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2. Op watter tye was die temperature –40 grade Celsius?

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3. Op watter tyd was die temperatuur die hoogste? Wat was die temperatuur gedurende daardie tyd?

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4. Op watter tyd het die temperatuur begin styg op Dag 2?

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5. Verskaf ‘n moontlike rede vir hierdie styging in temperatuur?

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8.3 Lewe op Mars?

Lewe op Mars is nie moontlik nie, aangesien daar geen suurstof, maar ook geen water, is nie. Indien ruimtevaarders ‘n basis op Mars wil oprig, sal genoegsame water een van die grootste probleme wees. Hulle kan water saamneem, maar die voorraad sal gou uitgeput wees.

Mens sou dalk kan redeneer dat plante water kan herwin, aangesien die blare waterdamp afgee wat dan kan kondenseer en as water afloop na die wortels.

Besin oor die volgende:

  • Kan plante gebruik word om water te produseer binne in die basis?
  • Is dit moontlik sonder suurstof?
  • Kan genoeg water vir menslike gebruik so geproduseer word?
  • Is daar genoeg energie om die bevrore water aan te wend vir menslike gebruik?

Elke groep kom doen nou kortliks verslag oor hulle bevindings en motiveer stellings of voorstelle wat gemaak word.

HOOFPUNTE VAN VERSLAG:

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Assessering

Leeruitkomste 1: 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.

Assesseringstandaard 1.2: Dit is duidelik wanneer die leerder ondersoeke uitvoer en data versamel: organiseer en gebruik toerusting of bronne om inligting te versamel en aan te teken.

Assesseringstandaard 1.3: Dit is duidelik wanneer die leerder data evalueer en bevindings kommunikeer; veralgemeen ten opsigte van ‘n relevante aspek en beskryf hoe die data die veralgemening steun;

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

Assesseringstandaard 2.1: Dit is duidelik wanneer die leerder betekenisvolle inligting onthou: onthou, ten minste, definisies en komplekse feite;

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

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Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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