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Natuurwetenskappe

Lewe en lewenswyse

Opvoeders afdeling

Memorandum

1. Ewe dik: ja nee

Ewe lank: ja nee

Hoofwortel nee ja

Vertakkings nee ja

2. Penwortels: Bome en struike, sommige kruide, rankplante. Lewe langer as ‘n jaar, word groot (moet anker) en/of moet water diep uit grond haal.

Bywortels: Grondbedekkers en plante wat net ‘n jaar oud word. Neem elke bietjie water op soos bv. dou. Hoef nie so diep vas te anker om regop te kan bly nie.

Diagram: Bywortels, penwortels, eensaadlobbiges, tweesaadlobbiges

Leerder afdeling

Inhoud

Aktiwiteit: om die wortelstelsels van plante te bestudeer [lu 1.2; lu 2.1, lu 2.2, lu 2.3]

Planteverskeidenheid

Jy het in graad 6 reeds geleer dat plante se blare verskillende vorms kan hê omdat hulle vir bepaalde omgewingstoestande aangepas is en dat die plante volgens hulle blare in groepe verdeel kan word.

Kom ons kyk nou na die wortels van plante.

Bestudeer die voorstellings van twee soorte wortels hieronder (jy sal jou onderwyser bly maak as jy werklike voorbeelde van plante met dié twee soorte wortels saambring klas toe).

‘n Bywortelstelsel

‘n Penwortelstelsel

1. Probeer om die tabel te voltooi deur ja of nee in elke blokkie te skryf:

Bywortelstelsel Penwortelstelsel
Al die wortels is ewe dik.
Al die wortels is ewe lank.
Daar is ‘n hoofwortel wat langer en dikker is as die ander.
Die wortels vertak (kleiner wortels groei uit die groter wortels).

2. Watter van die plante in die skets van ‘n ekosisteem (bladsy 3) dink jy sal penwortels hê en watter dink jy sal bywortels hê? Sê ook hoekom jy so dink.

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Onthou jy nog die onderstaande indeling van plante wat jy in graad 6 gedoen het? Gebruik dit wat jy nou oor wortelstelsels geleer het om die indeling verder aan te vul deur die ontbrekende inligting in die oop blokkies te skryf (vra jou onderwyser om jou te help).

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;

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 2.2: Dit is duidelik wanneer die leerder inligting kategoriseer: vergelyk kenmerke van verskillende kategorieë voorwerpe, organismes en gebeurtenisse;

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).

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
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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
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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
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Sadik
all
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by fussion
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Micheal
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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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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