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Natuurwetenskappe

Lewe en lewenswyse

Opvoeders afdeling

Memorandum

Opdrag 1:

‘n Instrument wat gebruik word om ‘n plant of dier te kan identifiseer (die naam te kan vasstel.). Dit verskaf opsies waartussen na aanleiding van die plant of dier se kenmerke gekies kan word en sodoende lei dit na die antwoord (die naam van die plant of dier ter sprake)

Leerder afdeling

Inhoud

Aktiwiteit: om plante te kategoriseer deur hulle kenmerke te vergelyk [lu 2.2]

Die ontwikkeling van ‘n sleutel om plante te klassifiseer

Jy het nou al met verskeie kenmerke van plante kennis gemaak en geleer dat ons die plante in terme van hul kenmerke groepeer. Baie werk is reeds in hierdie verband deur bioloë gedoen en alle plante wat aan die mens bekend is, is reeds by ‘n groep ingedeel. Nuwe plante wat ontdek word, kan ook onmiddellik in ‘n groep geplaas word.

Die voordeel hiervan is dat ons enige plant wat ons sien, kan eien, sy naam kan opspoor en met ander mense daaroor kan praat. Ons kan bv. vasstel of ‘n plant inheems of uitheems is, of dit ‘n skadelike onkruid is, wat ons met die plant moet maak, ensovoorts.

Om ‘n plant te eien, kan ons ‘n sleutel gebruik. Kom ons gebruik ons kennis oor plantkenmerke en plantgroepe en stel self so ‘n sleutel saam.

Die maklikste manier is om jouself voor te stel dat jy ‘n besonder interessante plant gesien het en jy gaan na ‘n plantkenner en vra hom/haar aan watter groep die plant behoort. Probeer dan dink watter vrae so ‘n persoon aan jou gaan stel om by die antwoord uit te kom.

Die persoon gaan waarskynlik vrae vra waarop jy ja of nee gaan antwoord. Sodoende skakel hy met elke vraag een moontlikheid uit en beweeg hy in die rigting van die antwoord.

Kom ons probeer. Gebruik die diagrammatiese indeling van plante op die vorige bladsy en werk dit aan die hand van vrae soos volg van bo na onder deur:

Kom ons probeer. Gebruik die diagrammatiese indeling van plante op die vorige bladsy en werk dit aan die hand van vrae soos volg van bo na onder deur:

1. Vorm die plant sade?

  • Ja ____________________________________________________

(Gaan na 2)

  • Nee ____________________________________________ Alge of mosse

(Gaan na 4)

2. Dra die plant blomme?

  • Ja _______________________________________________ (Gaan na 3)
  • Nee _________________ Keëldraende plante, bv. denneboom (Gaan na 12)

3. Is die blare netarig of het die plant ‘n penwortel?

  • Ja ________________ Tweesaadlobbige plante, bv. proteas (Gaan na 20)
  • Nee ____________ Eensaadlobbige plante, bv. grasse (Gaan na 40)

Assessering1

Beskryf in jou eie woorde wat ‘n sleutel vir die identifisering van plante of diere is en hoe dit gebruik word.

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Assessering

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

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

Questions & Answers

are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
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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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