# 3.8 Describing concepts

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## Describing concepts

Population: The people who live in a specific area (town/region/city/province/country/part of the world).

Population Distribution: Where people live within a specific area.

Population Density: How many people live in a specific area.

To work out the density of population of a region/country, you take the total population of the region/country and divide it by the total area (in square kilometres) of the region/country. Your answer should indicate the number of people on average that live in a square kilometre of the region/country.

One square kilometre is a square area measuring one kilometre by one kilometre:

Seen from the top:

DENSELY POPULATED ………………….. SPARSELY POPULATED

## [lo 1.1]

Use the following statistics, your pocket calculator and the formula above to calculate the population density of South Africa and India respectively. Round off your answer to the nearest integer.

Population of South Africa (according to 1996 census): 41 million (rounded off).

Area of South Africa: 1 219 090 km 2 (rounded off).

Population of India (according to 2001 census): 1 029 million (rounded off).

Area of India: 3 174 723 km 2 (rounded off).

What conclusion do you come to if you compare the population numbers of South Africa and India?

It is important to remember that the above numbers are only average numbers. There are areas in South Africa (and India) where more or fewer people live per km 2 .

## [lo 1.3; 1.7]

• Compile a list of approximately 10 questions that are found on a census form.e.g. How old are you?
 0 – 20 20 – 30 30 – 50 50+

In what type of house do you live?

 flat house on separate plot townhouse other

Which of the following articles are found in your home?

 television radio microwave computer camera telephone Cell phone satellite television internetetc.
• Your questions must be aimed at the general public, and not only at the local inhabitants.
• After the class has completed the census, process the information and put it in writing. E.g. 30% have a television set / 28% has access to the internet / 90% have cellular phones, etc.
• Illustrate one of the questions by means of a pie graph.

## [lo 1.7]

• The following numbers represent the size of the different population groups in South Africa according to the census information of 1996.
 Total population: 40,6 million Africans: 31,1 million Whites: 4,4 million Coloureds: 3,6 million Indians: 1,1 million Other: 0,4 million

Illustrate the population composition by means of a graph.

## Assessment

LO 1

GEOGRAPHICAL ENQUIRY

The learner will be able to use enquiry skills to investigate geographical and environmental concepts and processes.

We know this when the learner:

1.1 with guidance, selects and uses sources of useful geographical information [finds sources];

1.2 distinguishes between facts and opinions [works with sources];

1.3 categorises information [works with sources];

1.4 uses an index to find places on global atlas maps [works with sources];

1.6 identifies and explores possible solutions to problems [answers the question];

1.7 demonstrates knowledge and under-standing of the issue through projects, discussion, debate and charts [communicates the answer].

anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
Introduction about quantum dots in nanotechnology
what does nano mean?
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Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
it is a goid question and i want to know the answer as well
Maciej
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
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
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
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Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
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NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
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Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
for screen printed electrodes ?
SUYASH
What is lattice structure?
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
what's the easiest and fastest way to the synthesize AgNP?
China
Cied
types of nano material
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
how did you get the value of 2000N.What calculations are needed to arrive at it
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Berger describes sociologists as concerned with
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