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Social sciences: history

Grade 6

The development of medical science

Module 4

Aids: dreaded disease from africa

There still are many diseases that have not been cured. Every year people contract ‘flu and other illnesses from new viruses for which antidotes have yet to be found. Scientists continually work on new medicines to make our lives easier.

The two diseases feared by most people today, are cancer and AIDS. Much research has been done regarding these diseases and many patients who suffer from it, have been cured or have had their lives extended.

Activity 1:

To understand the different causes and consequences of aids

[lo 2.2]


Aids is the most dreaded disease of our times. It is said that more than 1 000 people contract this virus in South Africa per day. The problem is that scientists have not yet found an antidote for AIDS. People who contract this disease, may die from it.

b) What is HIV/AIDS?

AIDS infects the body by entering the bloodstream and breaking down the immune system so that the body cannot fight germs any longer. AIDS in itself cannot cause death, but it weakens the body so much that other illnesses can cause an infected person’s death.

c) How can you contract AIDS?

Have a class discussion on ways the disease is transmitted.

Homosexual contact

Heterosexual contact

Blood and blood products

Transfer at birth

Sharing contaminated hypodermic needles

d) Assignment on the results of AIDS

Study the following illustrations and discuss them in your groups . Then have a class discussion on the following topics. REMEMBER : Don’t think of this as a joke, but as a way of discovering more about this disease, so that people can avoid contracting AIDS.

A = acquired (to obtain)

I = immune (resistance to disease)

D = deficiency (shortage)

S = syndrome (a combination of symptoms that indicate a particular disease or disorder)

How does this disease work?

Body’s soldier

Kills germs

Body’s soldier dead. Other germs penetrate the body

e) Which precautionary measures related to hygiene must be taken at all times? Discuss the following in pairs.


You do not have to worry about contracting AIDS. If you avoid the situations that can lead to AIDS and follow the precautions, you can rest assured and carry on normally with your life. If people live carelessly, the possibility that they may contract AIDS is always there.


f) As an authority you have been asked to write a short article for an international publication about the seriousness of AIDS in South Africa. First explain briefly the causes and consequences, then suggest a plan of action to address the problem effectively.


LO 2
HISTORICAL KNOWLEDGE AND UNDERSTANDING The learner will be able to demonstrate historical knowledge and understanding.
We know this when the learner:
2.1 chronology and time:
  • places events, people and changes on a timeline which includes terms such as ‘BC’, ‘AD’ and ‘BCE’;
2.2 cause and effect:
  • gives reasons for and explains the results of key events and changes in more than one context;
2.3 change and continuity:
  • identifies some aspects of society which have changed and some which have stayed the same over time in more than one context.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket 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, History grade 6. OpenStax CNX. Sep 08, 2009 Download for free at http://cnx.org/content/col11011/1.1
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