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Natuurwetenskappe

Graad 8

Biodiversiteit: aanpassings en oorlewing

Module 31

Die wêreldbevolking

In die vorige leereenheid het ons genoem dat die groei van die wêreldbevolking sal bepaal of volhoubare ontwikkeling moontlik is en dat ons deeglik hiervan bewus moet wees.

Aktiwiteit:

Om inligting oor wêreldbevolking te vertolk

  • Bestudeer die volgende tabel en bereken die natuurlike aanwas per eenheid.

WêRELDBEVOLKINGSGROEI

PER TYDEENHEID

TYDEENHEID GEBOORTES STERFTES NATUURLIKE GROEI
Jaar 131 468 233 54 147 021 ..................................................
Maand 10 955 686 4 512 252 ..................................................
Dag 360 187 148 348 ..................................................
Uur 15 008 6 181 ..................................................
Minuut 250 103 ..................................................
Sekondes 4,2 1,7 ..................................................
  • Op 12 Oktober 1999 het die wêreldbevolking die 6 BILJOEN merk bereik!!!

1. Wat is die nuutste waardes op die World POP clock?

2. Wat sal dit wees teen 2050?

3. Bestudeer die volgende tabel en teken ’n grafiek van die wêreldbevoking 1985 – 2006.

JAAR BEVOLKING (Biljoen)
1985 4.85
1986 4,93
1987 5,01
1988 5,10
1989 5,19
1990 5,22
1991 5,36
1992 5,44
1993 5,52
1994 5,60
1995 5,68
1996 5,76
1997 5,84
1998 5,92
1999 6,00
2000 6,08
2001 6,15
2002 6,23
2003 6,31
2004 6,38
2005 6,36
2006 6,53
  • Selfassessering: Merk die toepaslike blokkie indien voltooi:
Kriteria Merk indien voltooi
OPSKRIF
INTERVALLE KORREK
GRAFIEKVORM
EENHEDE EN BYSKRIFTE
POTLOODLYNE

Assessering van GRAFIEK: Kon jy ’n grafiek teken volgens die kriteria?

[LU 2.3; 3.1]

Aktiwiteit: OM NA TE DINK OOR DIE ROL WAT JY SPEEL IN DIE TOEKOMS VAN DIE AARDE

  • Skryf ’n paragraaf oor jou indrukke van die toekoms van die mens op planeet aarde en die rol wat jy kan speel.

Assessering van indrukke:

Het jy sinvolle indrukke oor die aarde se TOEKOMS neergeskryf?

[LU 3.1]

WHAT ARE WE DOING?

PLANET Earth is 4,600 million years old.

If we condense this inconceivable timespan into an understandable concept, we can liken the Earth to a person of 46 years of age.

Nothing is known of the first seven years of this person’s life.

Only scattered information exists about the middle span, but we know that only at the age of 42 did the Earth begin to flower.

Dinosaurs and the great reptiles did not appear until one year ago when the planet was 45.

Mammals arrived only eight months ago.

In the middle of last week, man-like apes evolved into ape-like men.

And at the weekend the last ice age enveloped the Earth.

Modern man has been around for only four hours.

During the last hour man discovered agriculture.

The industrial revolution began a minute ago, and during those 60 seconds of biological time, man has made a rubbish dump of paradise.

He has multiplied his numbers to plague proportions, caused the extinction of 500 species of animals, ransacked the Earth for fuels, and now stands like a brutish infant, gloating over his meteoric rise to acendancy, on the brink of a war to end all wars, and of effectively destroying this oasis of life in the solar system

( Greenpeace )

Assessering

LU 2

Wetenskaplike Kennis

Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Dit is bewys as die leerder:

2.1 sinvolle inligting kan onthou;

2.2 inligting in kategorieë kan plaas;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

LU 3

Wetenskap, die Gemeenskap en die Omgewing

Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Dit is bewys as die leerder:

3.1 wetenskap as ‘n menslike aktiwiteit kan verstaan;

3.2 volhoubare gebruik van die aarde se hulpbronne verstaan.

Memorandum

Wêreldbevolking

  • Reël rekenaarsentrum-besoek of kry bronne vanaf internet vir leerders
  • Besoek die webtuiste www.census.gov:
  • Grafiekpapier vir oefening

ASSESSERINGRAAMWERK: Dra waardes oor

Questions & Answers

Biology is a branch of Natural science which deals/About living Organism.
Ahmedin Reply
what is phylogeny
Odigie Reply
evolutionary history and relationship of an organism or group of organisms
AI-Robot
ok
Deng
what is biology
Hajah Reply
cell is the smallest unit of the humanity biologically
Abraham
what is biology
Victoria Reply
what is biology
Abraham
HOW CAN MAN ORGAN FUNCTION
Alfred Reply
the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
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Source:  OpenStax, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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