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Geography

Grade 5

The physical structure of south africa

Module 7

The structure of the rsa

  • The surface of the RSA is not as flat as a tabletop. The uneven nature of the surface has to do with the structure or morphology of the land. Landforms such as coastal plains, lowlands, plateaux, mountains and rivers constitute the structure of the land.
  • If you look at the relief map of the RSA below, or at any physical map of the RSA in an atlas, you will understand that different parts of our country are situated on different altitudes above sea level.

Figure 1

  • Different colours are used on such a relief map to indicate the different altitudes above sea level:

Green = lowest areas, e.g. coastal regions

Yellow = just higher than the green areas (Little Karoo)

Orange = higher areas

Brown = mountains

Purple / white = highest mountain peaks

Blue = water

  • Use your atlas and colour your map according to the above-mentioned colour key.

Morphological areas of the rsa

Coastline and coastal plains

  • The coastline is the area where the land meets the sea. The RSA has a very long and almost unbroken coastline with few capes (points such as Cape Point) and few bays (such as Table Bay and False Bay). The only area where both these are to be found, is the Cape Peninsula.

Figure 2

  • The coastal plain is the low-lying area along the coast. The coastal plain of the RSA forms a narrow band between the sea and the mountains of the escarpment.

The little karoo and the great karoo

Figure 3

  • There is, however, an area between the sea and the escarpment where one first has to climb a few “steps” to reach the escarpment. These “steps” are called the Karoo. “Karoo” is a word meaning hard. Thus it is a hard, dry region.
  • It comprises two flat smaller plateaux between mountain ranges.
  • From the south coast (Mossel Bay) the land rises gradually from the coastal plain to the Outeniqua Mountains and the Langeberg. The low-lying area that follows this and lies just before the Swartberg Mountains is called the Little Karoo. To the north of the Swartberg range lies the Great Karoo , which is situated one step higher than the Little Karoo. It is found just before the Nuweveld Mountains, which form part of the escarpment.

Plateau and escarpment

  • The escarpment indicates where the plateau of the interior begins, and forms an unbroken mountain chain. It begins with the Kamiesberg range in the northwest, and towards the south it becomes the Roggeveld Mountains . It then veers towards the east, where the Nuweveld , Sneeu , and Storm mountain ranges are found. In the northwest one finds the Drakensberg range. Here the escarpment is much higher than elsewhere. The highest peaks of the Drakensberg are Mont-Aux-Sources (3 299 m) and Thaba Ntlenyana (3 482 m). The escarpment forms our country’s most important watershed.
  • The mountains of South Africa were formed by curvature, shifting or folding, just like all other mountains throughout the world. The Hex River Mountains, the Cederberg Mountains, the Swartberg range and the Langeberg Mountains are, for example, all fold mountains in sedimentary rock. Many of these have become flattened by erosion, and one does not see much of it. Examples of igneous rock can be seen in the Drakensberg range.
  • Unfortunately the escarpment prevents moist air from the sea reaching the interior plateau , which causes frequent droughts in the interior of the country.
  • The interior plateau is the vast stretch of land that is situated to the interior of the escarpment. It covers the greatest part of the RSA and lies from 900 m (west) to 3 000 m (east) above sea level.

Questions & Answers

what is the coefficient of -4×
Mehri Reply
-1
Shedrak
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
12, 17, 22.... 25th term
Alexandra Reply
12, 17, 22.... 25th term
Akash
College algebra is really hard?
Shirleen Reply
Absolutely, for me. My problems with math started in First grade...involving a nun Sister Anastasia, bad vision, talking & getting expelled from Catholic school. When it comes to math I just can't focus and all I can hear is our family silverware banging and clanging on the pink Formica table.
Carole
I'm 13 and I understand it great
AJ
I am 1 year old but I can do it! 1+1=2 proof very hard for me though.
Atone
hi
Adu
Not really they are just easy concepts which can be understood if you have great basics. I am 14 I understood them easily.
Vedant
find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
salma
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
Abhi
If f(x) = x-2 then, f(3) when 5f(x+1) 5((3-2)+1) 5(1+1) 5(2) 10
Augustine
how do they get the third part x = (32)5/4
kinnecy Reply
make 5/4 into a mixed number, make that a decimal, and then multiply 32 by the decimal 5/4 turns out to be
AJ
how
Sheref
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
I rally confuse this number And equations too I need exactly help
salma
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
salma
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
hi
salma
hi
Ayuba
Hello
opoku
hi
Ali
greetings from Iran
Ali
salut. from Algeria
Bach
hi
Nharnhar
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
kkk nice
Abdirahman Reply
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
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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Source:  OpenStax, Social sciences: geography grade 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10986/1.2
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