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Social sciences: history

Grade 7

The first people

Module 13

The taung child

  • The probable age of the earth is calculated to be 6 billion years. Human beings and their predecessors have only existed for about 5 million to 8 million years, while human beings who have cultivated their own food and have lived in organised communities have only been on the earth for 6 000 to 8 000 years. This takes up hardly one millionth of the world's age.
  • This module will help you to discover something about people who lived millions of years ago. What we have been able to discover about them has come from evidence. Much of this evidence is obtained from bones, tools and painted pictures that have been discovered. But there is virtually no source material for long periods in the past . . .
  • More than 3 000 parts of skeletons belonging to early people have already been gathered in Africa. The accompanying map shows the different places in South and East Africa where these discoveries were made.

  • Africa has become known as the cradle of mankind because some of the oldest human fossils have been discovered here.
  • We'll be finding out how the fossils that archaeologists have found are able to tell us about the lives of these early people.

The human race developed in Africa. The remains of a Southern African child who died about 3 million years ago have provided many clues about early people. This evidence of the earliest member of the human race identified to date was discovered in 1924 in a limestone quarry near the town of Taung (“the place of the big lion”), 80 km north of Kimberley (in the North-west Province. A worker who was blasting limestone in the quarry found a small skull, which was sent to Professor Raymond Dart.

He immediately realised that it was different to anything he had ever seen.

This skull displayed two important features of the human race (hominids), namely:

  • small eye-teeth and
  • an erect posture

The skull was particularly small, which led Professor Dart to conclude that it belonged to a child of about five years of age. This is what suggested the idea of a Taung child. The evidence indicated that the child walked upright, like we do. Professor Dart therefore gave it the scientific name Australopithecus . According to what we know at present, Australopithecus was the first creature that walked upright, like modern people.

Activity 1:

To reconstruct the past

[lo 3.3]

Try to convince your friend by means of scientific arguments that people could not have developed from apes. (Or organise a class debate!)

Source A

Source B

The anatomy of a chimpanzee compels this animal to walk on the outside edges of its feet and therefore to waddle. This differs from the way of walking that is common to human beings, which was also used by Australopithecus .

People are the only primates that walk upright.

This means that the shape of the pelvic girdle, the position of the thighbone and the way in which the feet are placed on the ground are very specific.

The way in which the thighbone bears the weight of the body in humans is also different from how this happens in apes. It is easy to see that Australopithecus is more closely related to human beings than to apes with regard to all these aspects when the Australopithecus skeleton is compared to the skeletons of apes and humans.

Questions & Answers

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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Source:  OpenStax, History grade 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11023/1.1
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