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Natuurwetenskappe

Graad 4

Die planeet aarde en die heelal

Module 48

Lewe by die suid- en noordpool

Aktiwiteit:

Om te praat oor dierelewe in die poolstreke

[lu 1.2]

Dierelewe in die Noordpool (Arktika)

Daar woon wolwe, bere, eekhorings en voëltjies in die woude, en in die somer migreer die kariboe, wat ‘n Amerikaanse soort rendier is, na die noorde om op wilde plante te leef.

Muskusbeeste lewe op die toendra deur die hele jaar. Hulle beskerm hulleself deur in ‘n sirkel te staan as die wolwe hulle aanval.

In die winter hiberneer die meeste diere. Bere slaap die meeste van die tyd in hulle skuilings en die eekhorings krul hulself op in hulle snoesige gate. Hulle het baie kos in die somer geëet wat nou as energie in hulle liggame gestoor is.

Die walrus woon ook hier en is familie van die robbe. Hulle is soogdiere wat lewendig gebore word en aan hulle mammas drink.

Poolbere is een van die wêreld se grootste diere. Hulle het ‘n laag dik, sagte hare teen die vel en dan ‘n buitenste laag pels met lang hare.

Dierelewe by die Suidpool (Antarktika)

Die albatros, wat een van die grootste seevoëls is, lewe ook by die Suidpool. Hy vlieg oor die see en soek sy kos in die water.

Die grootste dier op aarde, die blouwalvis, lewe in Antarktiese waters. Dit word 30 m lank!

Baie min soorte diere lewe in Antarktika, maar in die somer kom die robbe en pikkewyne soontoe om kleintjies te kry. Die kleintjies is veilig, want daar is redelik min roofdiere wat hulle kan vang.

Baie soorte pikkewyne woon by die Suidpool. Die grootste een is die keiser-pikkewyn wat ongeveer 1 m groot kan word. Hulle kan nie vlieg nie, maar is uitstekende swemmers.

Hoe oorleef die mense in die pole?

Die Inuit-mense lewe in Arktika. Hulle maak vir hulle klere van lekker warm dierevelle om hulleself warm te hou. Hulle woon in klein dorpies waar hulle gedurende die wintermaande ys moet smelt om water te kry.

Hulle jag om kos in die hande te kry en woon in yshutte wat igloes genoem word. Hulle vorm ysblokke tot ‘n koepel en vul die openinge met sneeu.

‘n Ander groep mense, wat die Saami genoem word, woon in Lapland. Hulle is bekend daarvoor dat hulle rendiere aanhou vir melk, vleis en pels. Hulle hou daarvan om tradisionele klere te dra wanneer hulle toeriste op sleeritte neem.

Die mense werk vandag in fabrieke en woon in huise wat van klip of hout gemaak is. Hulle dra moderne klere en ry in sneeumobiele rond.

Skryf ‘n paragrafie van 150 woorde oor hoe diere aangepas het om in die poolstreke te kan woon.

Assessering

LEERUITKOMS 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.

Assessering

Dis duidelik wanneer die leerder

1.2 ondersoek uitvoer en data versamel.

Questions & Answers

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
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
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 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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