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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

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
salma
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
hmm
Abhi
is it a question of log
Abhi
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Abhi
I rally confuse this number And equations too I need exactly help
salma
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
salma
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
hi
salma
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?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
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
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
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
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 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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