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Lewe en lewenswyse

Opvoeders afdeling


1. organismes



2. produsente (voedselproduseerders)





3. Ligging, klimaat, grond, water, atmosferiese gasse (meer spesifieke faktore kan ook genoem word, bv helling en suid-/oos-/wes-/noordwysend ipv ligging, of temperatuur, reën en wind ipv klimaat).


1. Alle materiale word in die natuur gehersirkuleer en daarom raak die bronne nie uitgeput nie. Wat uit die grond of lug geneem word, keer uiteindelik weer terug.

2. Water: uit grond na plante en diere (en in lug in), weer terug na grond (urine en ontlasting) of lug (sweet, verdamping).

Koolstofdioksied: uit lug na plant, vasgelê in voedsel, na dier, vrygestel aan lug.

Bestanddele in grond, na plant, vorm voedsel, na dier wat plant vreet, met urine of ontlasting of as dier of plant vrek, terug na grond

3. Om te voorkom dat die natuurlike bronne uitgeput raak/die stowwe opgebruik word.

Leerder afdeling


Aktiwiteit: om jou kennis van ekosisteme te hernu [lu 2.1, 2.3]

Die ekosisteem

Toets jou kennis

Jy het in graad 6 reeds met die begrip “ekosisteem” kennis gemaak. Kom ons kyk wat jy nog kan onthou:

Voltooi: ‘n Ekosisteem is al die lewende ______________________ wat in ‘n

bepaalde _______________ lewe, asook al die ___________ faktore wat die

aard van die omgewing bepaal.

In ‘n ekosisteem is die plante die ___________________, terwyl die diere die

____________________ is. Diere kan op grond van hul voedingswyse in drie

groepe verdeel word, naamlik _________________, ____________________

en ___________________________________________________________ .

Die nie-lewende faktore wat die toestande in die ekosisteem bepaal, is _______________________________, _____________________________,

_______________________________ en ___________________________ .

Siklusse en balans binne ‘n ekosisteem

‘n Ekosisteem kan diagrammaties soos volg voorgestel word:

Probeer om die volgende vrae wat oor die diagram handel te beantwoord:

1. Hoekom word die ekosisteem in die vorm van ‘n siklus voorgestel?








2. Noem drie stowwe/verbindings wat volgens die diagram in ‘n ekosisteem gesirkuleer word en beskryf elke siklus kortliks:








3. Hoekom is dit belangrik dat die stowwe gesirkuleer word?









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

Assesseringstandaard 2.1: Dit is duidelik wanneer die leerder betekenisvolle inligting onthou: onthou, ten minste, definisies en komplekse feite;

2.3 inligting interpreteer: interpreteer inligting deur kernidees in die teks te identifiseer, patrone in aangetekende data te vind en gevolgtrekkings te maak uit inligting in verskeie vorme (bv. prente, diagramme en geskrewe teks);

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
I'm not good at math so would you help me
what is the problem that i will help you to self with?
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
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
what is system testing
what is the application of nanotechnology?
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
anybody can imagine what will be happen after 100 years from now in nano tech world
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
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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