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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

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
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Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
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How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
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Micheal
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Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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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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