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Natuurwetenskappe

Ekosisteem en omgewingsbalans

Opvoeders afdeling

Memorandum

Opdrag 7:

1 - skubbe

2 - stertvin

3 - systreep

4 - kieuspleet

5 - rugvin

6 - oog

FUNKSIES

1. Maak liggaam vaartbelyn sodat dit so min as moontlik weerstand bied as die vis swem.

2. Slym wat deur die kliere in die opperhuid afgeskei word, maak die skubbe glad en glibberig. Dit help die vis om makliker deur die water te beweeg.

3. Die water spoel in by die kieuspleet en spoel oor die kieue sodat die suurstof deur die bloedvate opgeneem kan word. Die kieuspleet bedek ook die kieue.

4. Dit het kragtige spiere en word heen en weer geswaai sodat die vis vorentoe kan beweeg.

5. Dit is daar om die vis regop te hou en te help met balans.

6. Die systreep bestaan uit ‘n lang ry openinge waarin senuselle is. Dit stel die vis in staat om verskille in druk waar te neem en so sy diepte in die water te bepaal.

Opdrag 8:

DUIF

1. Om kos op te pik; om nes te bou; kuikentjies te voer; vere glad te stryk en vir verdediging.

2. Die vere, veral die ligte penvere, maak die vlerkoppervlakte groter.

3. Vere is swak geleiers van hitte en bewaar dus die liggaamshitte van die duif. 4. Die dekvere kom feitlik oor die hele liggaam voor en die donsvere daaronder.

5. Die toon wat agtertoe wys, help om die duif te balanseer. Die pote help die duif ook om op die grond te loop en om sy gewig om ‘n tak te sluit wanneer hy gaan sit.

6. Dit maak die nek baie beweeglik en dus kan die duif sy kop in enige rigting draai.

7. Om die poot te beskerm en droog te hou.

Dit maak die duif nog meer vaartbelyn en verminder die lugweerstand wanneer die duif vlieg.

Leerder afdeling

Inhoud

Aktiwiteit: om te ontdek hoe diere aangepas is om in hulle habitat te oorleef [lu 2.3]

(i) Verskille ten opsigte van uitwendige bou

Diere is aangepas om te kan oorleef in hul habitat, bv. visse is aangepas om in die water te kan woon.

Opdrag 7

Bestudeer die skets van die karp (varswatervis) en identifiseer die uitwendige liggaamsdele. Skryf die liggaamsdeel langs die korrekte nommer neer:

1.___________________________________________________________________2. ___________________________________________________________________

3. ___________________________________________________________________

4. ___________________________________________________________________

5. ___________________________________________________________________

6. ___________________________________________________________________

Elkeen van hierdie uitwendige liggaamsdele speel ‘n baie belangrike rol in die vis se oorlewing in die water. Dui aan wat die funksie van elk van die volgende is:

EIENSKAP FUNKSIE
spoelvormige liggaam ___________________________________________
skubbe ___________________________________________
kieuspleet ___________________________________________
stertvin ___________________________________________
rugvin ___________________________________________
systreep ___________________________________________

Opdrag 8

Bestudeer ook die skets van die uitwendige bou van die duif en beantwoord dan die daaropvolgende vrae:

1. Die duif het ‘n kort, horingagtige snawel. Noem vyf funksies van die snawel.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

2. Sy voorste ledemate is gewysig tot vlerke sodat die duif kan vlieg. Die sterk borsspiere weerskante van die borsbeen beweeg die vlerke soos spane wat op die lug druk. Hierdeur word die duif opwaarts en vorentoe gedryf. Wat help om die oppervlakte van die vlerke te vergroot?

_____________________________________________________________________

3. Daar is ook dekvere en donsvere op die duif se liggaam. Watter funksie verrig hulle?

_____________________________________________________________________

_____________________________________________________________________

4. Die duif se pote is ook aangepas by sy gewoontes. Die drie tone wat vorentoe wys en die een wat agtertoe wys, is spesiaal aangepas. Waarvoor?

_____________________________________________________________________

_____________________________________________________________________

5. Die nek is taamlik lank en beweeglik. Watter voordeel hou dit vir die duif in?

_____________________________________________________________________

_____________________________________________________________________

6. Die pote is met skubbe bedek. Waarom?

_____________________________________________________________________

_____________________________________________________________________

7. Die vere lê met hulle vry ente na agter en die liggaam is bootvormig. Waarom is dit so?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Self-assessering

KRITERIA NEE/JA
Ek kon maklik die funksie van die onderskeie liggaamsdele uitken ______________
Ek kon logiese afleidings maak _____________
Ek kon onafhanklik werk _____________

Assessering

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

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder inligting interpreteer.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
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
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Source:  OpenStax, Natuurwetenskappe graad 6. OpenStax CNX. Sep 17, 2009 Download for free at http://cnx.org/content/col11080/1.1
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