<< Chapter < Page Chapter >> Page >

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.

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

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

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 7' conversation and receive update notifications?

Ask