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Sosiale wetenskappe: aardrykskunde

Graad 6


Module 1

Bepaling van rigting

Bepaling van rigting

1. Die gebruik van lengte- en breedtelyne om ligging aan te dui.

Net soos ons lyne op 'n kaart of plan intrek, word daar ook sekere denkbeeldige lyne op die aarde geteken. Presies halfpad tussen die Noord- en Suidpool lê die EWENAAR. Die ewenaar word die 0° breedtelyn genoem en loop van oos na wes. Parallel met die 0° breedtelyn loop daar nog ‘n 90°N en 90°S breedtelyn by die twee Pole.

Die ewenaar verdeel die aardbol in twee helftes. Die “boonste” helfte word die NOORDELIKE HALFROND genoem en die “onderste” helfte word die SUIDELIKE HALFROND genoem.

Daar is ook denkbeeldige lyne wat van noord na suid loop. Hulle word die lengtelyne genoem. Die lengtelyn wat op 0° lê, word die GREENWICH-lengtelyn genoem. Dit verdeel die aarde weer in 'n WESTELIKE HALFROND en OOSTELIKE HALFROND. Oos van die Greenwich lengtelyn is daar 180 lengtelyne en wes van die Greenwich lengtelyn is daar ook 180 lengtelyne.

Al hierdie lengte- en breedtelyne vorm kruispunte op die aarde waarmee 'n plek se presiese ligging aangedui kan word. Meer hieroor later. Vir nou is dit genoeg dat jy kan aandui in watter halfrond / halfrondes 'n plek, land of kontinent geleë is.

Aktiwiteit 1:

Om vrae te beantwoord

[lu 1.3, 1.5]

Bestudeer die wêreldkaart in jou atlas en beantwoord die volgende vrae.

  • Noem die vastelande waardeur die ewenaar gaan.
  • Die ewenaar loop deur drie oseane. Noem hulle.
  • Is Kaapstad in die Oostelike of Westelike Halfrond geleë?
  • Watter vasteland lê heeltemal noord van die ewenaar?
  • Watter vasteland lê heeltemal in die Westelike Halfrond?

In watter twee halfrondes is Suid-Afrika geleë?

2. Die kenmerke van Lengte- en Breedtelyne.

Lengte- en breedtelyne

3. Breedtelyne

‘n Paar belangrike feite:

Die bekendste is die ewenaar (0°-breedtelyn)

  • Die keerkringe is by 23½° geleë.
  • Die poolsirkels is by 66½° geleë.
  • Die pole is by 90° geleë (eintlik ‘n punt en nie ‘n lyn nie).
  • Alle breedtelyne is parallel (eweredig) aan mekaar.
  • Breedtelyne dui die noordelike en suidelike halfrondes aan.
  • Wanneer ligging aangedui word, word ‘n plek se breedteligging eerste genoem.
  • ‘n Plek se breedteligging is ‘n goeie aanduiding van die klimaat daarvan. Julle weet reeds dat ‘n plek naby die ewenaar (0°) normaalweg baie warm is. Ook weet julle dat ‘n plek naby die pole (90°) baie koud is. Onthou net dat daar meer faktore is wat ‘n plek se klimaat bepaal as net die breedteligging.

Die belangrikste breedtelyne

4. Lengtelyne

‘n Paar belangrike feite:

  • Die bekendste is die Greenwich-meridiaan (0° lengtelyn).
  • Vanaf Greenwich (0°) word die lengtelyne na oos tot by 180° genommer.
  • Dit vorm die Oostelike Halfrond.
  • Vanaf Greenwich (0°) word die lengtelyne na wes ook tot by 180° genommer.
  • Dit vorm die Westelike Halfrond.
  • Lengtelyne kom by die pole bymekaar en is almal ewe lank.
  • By die ewenaar is die lengtelyne die verste van mekaar geleë.
  • Wanneer ‘n plek se ligging aangedui word, word lengteligging altyd tweede genoem.

Oostelike Halfrond

Westelike halfrond

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
Idrissa Reply
im all ears I need to learn
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what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
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Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
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Rachael Reply
I'm not good at math so would you help me
what is the problem that i will help you to self with?
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
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Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
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Ramkumar Reply
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Sravani Reply
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Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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, Aardrykskunde graad 6. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10999/1.1
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