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Graad 8

Biodiversiteit: aanpassings en oorlewing

Module 24


Fossiele is die oorblyfsels van dooie plante, diere, bakterieë en ander lewensvorme wat miljoene jare gelede geleef en toe versteen het.

Fossiele is dus versteende oorblyfsels van organismes, bv. tande, bene, bas of skulpe. Dit kan ook spore of afval van organismes wees.

1. Wanneer ’n dier/organismes doodgaan vergaan die sagte dele eerste. Die res word in die sand of modder bedek.

2. Oor miljoene jare vind chemiese veranderinge sowel as drukking plaas wat dit laat versteen.

3. Water wat deursyfer kan ook veranderinge teweeg bring. Die vorms word goed behou.

4. Beweging van die aardplate bring die fossiele na die oppervlak.

Aktiwiteit: om navorsing oor fossiele te doen

  • Wat is ’n paleontoloog?

OPDRAG: Teken ’n vloeidiagram om die fossielvormingsproses eenvoudig voor te stel.

Assessering van vloeidiagram:

Kon jy ’n sinvolle vloeidiagram van die fossielvormingsproses teken?

[LU 2.2]

Aanpassings – Fossiele


  • Bestudeer die volgende prente van fossiele en probeer afleidings maak t.o.v. hul voeding en bewegings:

Skedel van ’n Suid-Afrikaanse dinosourus ( Mossospondvlus )

Brachiopoda skulpe in ’n 500 – 300 miljoen jaar oue strandneersaksel

Skedel van ’n Suid-Afrikaanse dinosourus ( Mossospondvlus )

’n Vlieg wat in die 90 miljoen jaar oue neerslae van die Orapa diamantkrater gevind is (Botswana)

Assessering van afleiding:

Kon jy die korrekte afleidings t.o.v. die fossielsketse maak?

[LU 2.3]


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.




  • Kry bronne oor fossiele, paleontoloë en opgrawings
  • www.ru.ac/za/pssa/pssalaw.hrml - fossils and SA law


  • Wat is 'n paleontoloog?

Persoon wat fossiele bestudeer

  • Wat sê die wet?


  • Teken 'n vloeidiagram om die fossielvormingsproses eenvoudig voor te stel.

Sagte dele vergaan – drukking – water vervorm – verstening – verskuiwings

Aktiwiteit: Afleidings

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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.
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
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
characteristics of micro business
for teaching engĺish at school how nano technology help us
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
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
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
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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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