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NATUURWETENSKAPPE

Ekosisteem en omgewingsbalans

Opvoeders afdeling

Memorandum

Opdrag 15:

1 Plante en diere gaan dood

2 Plante en diere produseer afvalmateriaal

3 Ontbinders breek die afvalmateriaal af en gebruik sommige dele as voedsel

4 Ander dele word afgebreek as chemikalieë en weer vrygestel in die lug of grond

5 Die chemikalieë word weer deur ander plante geabsorbeer en opgeneem in voedselketting.

LEERKRAG AFDELING

Inhoud

Aktiwiteit: om die belangrike rol wat plante in die ekosisteem vervul, te bestudeer [lu 1.2, lu 2.3]

Plante (produseerders) gebruik eenvoudig nie-lewende materiaal (water, sonlig, kooldioksied en minerale) om hul eie voedsel te vervaardig. Die proses word fotosintese genoem, maar jy sal meer daarvan in die volgende module leer. Suurstof word terselfdertyd vrygestel.

Ontwerp nog twee voedselkettings met plante as die produseerders.

(a) Die rol van swamme in die ekosisteem

Swamme staan bekend as die “arm” familie van die planteryk omdat hulle geen groen kleurstof bevat nie. Die groen kleurstof, chlorofil, stel groen plante in staat om self kos te vervaardig uit koolsuurgas en water. Groen plante staan dus op hulle eie voete en is van geen ander lewende wese afhanklik vir kos nie. Swamme en bakterieë, daarenteen, is dus net so afhanklik soos diere van die kos wat groen plante vir hulle moet berei.

Wanneer ‘n plant of ‘n dier doodgaan, gaan die opgebergde energie nie verlore nie. Mikroskopiese swamme en bakterieë teer op hul liggame en breek dit in die proses af. Sodoende word dit weer deel van die grond. Hierdie plante word ontbinders genoem, weens hulle unieke rol in die natuur.

Opdrag 15

Bestudeer die volgende diagrammatiese voorstelling oor die ontbindingsproses. Dit demonstreer hoe dooie organismes afgebreek en deur ontbinders hersirkuleer word. Gebruik nou die byskrifte wat volg en skryf hulle op die korrekte plekke in. Die byskrifte is nie in volgorde nie:

  • Plante en diere produseer afvalmateriaal, bv. blare.
  • Ontbinders breek die afvalmateriaal af en gebruik sommige dele as voedsel.
  • Ander dele word afgebreek as chemikalieë en weer vrygestel in die lug of grond.
  • Plante en diere gaan dood.
  • Die chemikalieë word weer deur ander plante geabsorbeer en weer opgeneem in die voedselketting.

(i) Struktuur van die Swamplant

Die swamplant self bestaan uit vertakte drade wat soms in vakkies verdeel is, bv. broodskimmel, of soms saamgevleg is tot ‘n groot, vaste liggaam, bv. sampioene. Baie swamme is eetbaar, maar daar is ook soorte wat uiters giftig is. Dit is veiliger om maar net die welbekende sampioene te eet. Die sampioen word as ‘n klein, ronde wit knopie deur die grond opgestoot. Dit word groter en rek uit op ‘n steel en gaan uiteindelik oop soos ‘n sambreel.

Onder die sambreel straal die sporeplaatjies in ‘n kring om die steel uit. In regte sampioene is die sporeplaatjies rooskleurig as hulle jonk is en swartbruin as hulle volwasse is. Geeneen van die giftige paddastoele het hierdie kleur nie, dus is die kleur die beste aanduiding of dit ‘n giftige paddastoel of ‘n eetbare sampioen is. ‘n Mens moet nooit ‘n paddastoel eet wat baie na ‘n sampioen lyk, maar wit plaatjies het nie, want dit kan mens se dood veroorsaak.

Questions & Answers

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
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
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
Difference between extinct and extici spicies
Amanpreet Reply
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Source:  OpenStax, Natuurwetenskappe graad 6. OpenStax CNX. Sep 17, 2009 Download for free at http://cnx.org/content/col11080/1.1
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