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SOURCE AHeinemann International Student’s Dictionary:

carat 1. a unit of measurements for the weight of precious stones, equal to 0.2 grams. 2. a unit of measurement for the purity of gold. Pure gold is 24 carats.

SOURCE B

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1. Compare these two sources.

1.1 Write down any fact from one of these two sources that will still be true in your opinion in five years time./2/

1.2 Which of the two sources do you believe? /1/

1.3 Give a reason for your previous answer. /2/

2. A dictionary is a secondary source , because it puts different information from different sources together. A primary source is an original piece of work, like a painter’s painting or a person’s diary.

2.1 What type of source is Source B? /1/

2.2 Give a reason for your answer. /2/

3. Jewellers often mix gold with iron when making a ring.

3.1 Why do they do that? /2/

/ 10 /

Assessment

Learning outcomes (LOs)

LO 1

Historical Enquiry

The learner will be able to use enquiry skills to investigate the past and present.

Assessment standards(ASs)

We know this when the learner:

1.1 continues to identify and select a variety of historical and archaeological sources relevant to an inquiry [finds sources];

1.2 evaluates the sources used (e.g. “Who created the source?”, “Is it reliable?”, “How useful is the information”) [works with sources];

1.3 interprets graphical and statistical sources [works with sources];

1.4 presents an original idea as part of an answer to questions posed [answers the question];

1.5 communicates knowledge and understanding by constructing own interpretation and argument based on the historical sources (including extended writing, artwork, graphics and drama); uses

information technology where available and appropriate [communicates the answer].

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 begins to make links between historical events and processes in different contexts in the same period [chronology and time];

2.2 recognises the cause and effects of events vary in importance [cause and effect];

2.3 explains changes in a wider historical and environmental context [change and continuity].

LO 3

Historical Interpretation

The learner will be able to interpret aspects of history.

We know this when the learner:

3.1 examines historical interpretation by asking relevant questions about the author of an historical source [source interpretation];

3.3 explains why history is not objective or neutral [source interpretation];

3.4 recognises that sense of identity may influence the events in the past are interpreted [influence on interpretation];

3.5 describes main features and uses of material remains of the past in a given context [representation of the past];

3.6 explains the importance of conserving our natural and cultural heritage (e.g. objects, buildings, heritage sites) [representation of the past].

Memorandum

Activity 1:

  • The facts accompanying the dates below are self-explanatory. Grade 8s have to strive to obtain full information, without having everything presented to them. Asking questions dealing with What? Where? and/or By whom? is a good recipe to follow to gain completeness.

TIME LINE : THE DISCOVERY OF GOLD AND DIAMONDS IN SAOR : EVENTS ON THE SA DIAMOND AND GOLD FIELDS

1852 : J.H. Davis discovers the first gold deposits on a farm near Krugersdorp.

1852 : Britain returns the Transvaal to the Transvalers with the signing of the Sand River Convention.

1854 : British control of the Orange Free State comes to an end with the signing of the Bloemfontein Convention by Britain and the Orange Free State.

1867: The first diamond is discovered near Hopetown.

1868 : Gold is discovered at Tati, north of the Limpopo.

1870 : Diamonds are discovered at Dutoitspan, later known as Kimberley.

1871 : Diamonds discovered at Vooruitzicht, another dry diggings.

1886 : Walker and Harrison’s find at Langlaagte becomes known as the main gold reef of the Witwatersrand.

1892 : Johannesburg linked by rail with Cape Town.

1895 : Johannesburg linked by rail with Durban.

Activity 2: SOURCE A and B

1.1 Any example from Source A, e.g. “24 carat gold is pure (100%) gold.”

1.2 Source A

1.3 The information is reliable, it has been the subject of research. OR: Dictionaries are reliable sources.

2.1 A primary source

2.2 An advertisement is an original source, just like an eyewitness report.

3. The ring would not show scratches as easily. The ring is cheaper. / 10 /

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
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
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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.
Bharti
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
Daniel
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
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
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
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
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
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.
Tarell
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.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
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
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 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11044/1.1
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