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Voortplanting

Klein spinnekoppe lyk soos volwassenes.

Die spinnekop en ander aragnide in die ekosisteem

Soos die insekte is spinnekoppe, skerpioene en bosluise baie goed by hul omgewing aangepas. Hulle kan uiters droë toestande oorleef. Hulle voed op ander diere wat ook jagters is (egter nie die bosluis nie, wat ‘n parasiet is) en speel dus ‘n belangrike rol in die handhawing van ‘n balans in die ekosisteem. Spinnekoppe moet dus liefs nie doodgemaak word nie. Dieselfde geld vir skerpioene, maar oppas vir dié met dik sterte – hulle is giftig vir die mens.

Opdrag 4:

Bestudeer die volgende paragraaf en beantwoord die vrae wat volg:

Die eienaar van ‘n tuin spuit gif op die plante in sy tuin om van ruspers ontslae te raak. Die tuinier is ongelukkig hieroor en besluit om te kyk hoe die gif ander diere in die tuin affekteer. Hy tel onder andere elke dag hoeveel spinnekoppe en vlieë hy in die tuin kan kry. Hy wil nie vir ons sê watter dier Dier X in die tabel is nie. Hy teken die getalle aan.

Getal diere wat op die aangeduide datums in ‘n tydperk van een uur in die tuin gevind word.

2 Januarie 9 Januarie 16 Januarie 23 Januarie
Spinnekoppe 20 10 7 2
Vlieë 2 12 24 38
Dier X 5 4 2 0

1. Verduidelik wat vanaf 2 Januarie tot 23 Januarie in die tuin gebeur deur na die syfers te verwys.

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2. Watter dier sou Dier X moontlik kan wees? Verduidelik hoekom jy so dink.

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3. Wat behoort die eienaar hieruit te leer?

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Assessering

Leeruitkomste 1: 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.

Assesseringstandaard 1.3: Dit is duidelik wanneer die leerder data evalueer en bevindinge kommunikeer: veralgemeen ten opsigte van ‘n relevante aspek en beskryf hoe die data die veralgemening steun.

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

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder 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);

Assesseringstandaard 2.4: Dit is duidelik wanneer die leerder kennis toepas in ‘n variasie van ‘n bekende situasie: pas konseptuele kennis toe deur ‘n begrip wat onderrig is met ‘n variasie van ‘n soortgelyke situasie in verband te bring.

Questions & Answers

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
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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.
Bharti
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
for teaching engĺish at school how nano technology help us
Anassong
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
NANO
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
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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
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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