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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

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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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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