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Natuurwetenskappe

Graad 8

Biodiversiteit: aanpassings en oorlewing

Module 24

Fossiele

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

AKTIWITEIT:

  • 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]

Assessering

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

Fossiele

Klasaktiwiteit: FOSSIELTEKENINGE

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

Aktiwiteit:

  • Wat is 'n paleontoloog?

Persoon wat fossiele bestudeer

  • Wat sê die wet?

OPDRAG:

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

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

Aktiwiteit: Afleidings

Questions & Answers

the diagram of the digestive system
Assiatu Reply
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
what is cell divisoin?
Aron Reply
Diversity of living thing
ISCONT
what is cell division
Aron Reply
Cell division is the process by which a single cell divides into two or more daughter cells. It is a fundamental process in all living organisms and is essential for growth, development, and reproduction. Cell division can occur through either mitosis or meiosis.
AI-Robot
What is life?
Allison Reply
life is defined as any system capable of performing functions such as eating, metabolizing,excreting,breathing,moving,Growing,reproducing,and responding to external stimuli.
Mohamed
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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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