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Natuurwetenskappe

Graad 8

Omgewing en interaksies

Module 36

Spesiale voedselverwantskappe

Aktiwiteit 1:

Om spesiale voedselverwantskappe te kan identifiseer en aan die hand van voorbeelde te kan beskryf

[lu 2.4]

Behalwe die tipiese roof- en prooi-verwantskappe, is daar sekere verhoudings wat baie interessant en spesiaal is, veral omdat hulle ook aan oorlewingstrategieë gekoppel is.

SIMBIOSE is die saamleef van twee verskillende organismes.

Hierdie saamleefverhouding kan egter verskil ten opsigte van die hoeveelheid voordeel of nadeel wat elke party kry.

Kommensalisme

  • Die een organisme word bevoordeel en die ander een word nie juis beïnvloed nie.

Mutualisme

  • Beide organismes word bevoordeel.

Parasitisme

  • Een organisme word definitief bevoordeel ten koste van die ander een.

Maak ‘n lys van die verwantskappe en plak ’n gepaste prent of ’n tekening onder die hofie. Beskryf daarnaas die kenmerke van die verhouding.

Assessering van KNIP EN PLAK van SIMBIOSE-SKETSE.

Kon jy SIMBIOSE-TIPES korrek identifiseer en beskryf?

[LU 2.4]

Aktiwiteit 2:

Om oor parasitisme navorsing te doen en die resultate grafies op ’n plakkaat voor te stel

[lu 1.1; 1.2; lu 1.3]

Werk in groepe van vier en versamel voorbeelde van die verskillende soorte parasiete wat mens en dier as gasheer gebruik.

  • Verduidelik die volgende:

1. die parasiet en gasheer, en die aard van hul verhouding;

2. simptome wat by die gasheer waargeneem kan word;

3. die bestryding van die parasiete.

  • Verdeel die take in die groep sodat elkeen verantwoordelik is vir ’n deel.
  • Onthou plante het ook parasiete – vind uit hieroor en gebruik minstens een plant as voorbeeld. Dra die plakkaat aan die klas voor.

Assessering van GROEPWERK, NAVORSING EN KOMMUNIKASIE oor PARASIETE

Kon jy bydra tot die groep se navorsing en dit aan die klas kommunikeer?

[LU 1.1; 1.2; 1.3]

Assessering

LU 1

Wetenskaplike Ondersoek

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.

Dit is bewys as die leerder:

1.1 ondersoeke kan beplan;

1.2 ondersoeke kan uitvoer en data kan insamel;

1.3 data kan evalueer en bevindinge kan kommunikeer.

LU 2

Wetenskaplike Kennis

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

Dit is bewys as die leerder:

2.1 sinvolle inligting kan onthou;

2.2 inligting in kategorieë kan plaas;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

Memorandum

Aktiwiteit 1: spesiale voedselverwantskappe

Mutualisme : voël en blom: voël kry kos (bevoordeel), blom word bestuif (bevoordeel)

Parasitisme : bosluis op perd: bosluis kry kos (bevoordeel), perd verloor bloed (benadeel)

Kommensalisme : bees en voël: bees jaag insekte op en dra bosluise wat op gras beland, kos vir voël terwyl bees nie geraak word nie Haai en vissies: vissies vreet reste van wat haai vreet, haai word nie geraak nieLigene op boom: boom bied groeiplek, word self nie geraak nie

Aktiwiteit 2: navorsing oor parasitisme

Assesseer die leerder se poging in terme van die drie assesseringstandaarde 1.1 (beplanning), 1.2 (dataversameling), en 1.3 (interpretasie en kommunikasie).

Questions & Answers

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
Do somebody tell me a best nano engineering book for beginners?
s. Reply
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
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
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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