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Natuurwetenskappe

Graad 9

Lewensprosesse: ‘n gesonde lewe

Module 9

Groei, ontwikkeling en adolessensie

'n Organisme groei as hy toename in massa en grootte toon.

'n Organisme ontwikkel as sy selle en weefsels ander vorms en funksies aanneem.

Die mens groei vanaf die sigoot deur die volgende stappe:

  • Morula: soliede balletjie selle
  • Blastula: 'n hol balletjie selle wat begin differensieer
  • Embrio: eerste twee maande
  • Fetus: vanaf twee maande

Na geboorte is daar weer 'n reeks ontwikkelings:

  • Baba: vanaf geboorte
  • Kleuter: ongeveer vanaf twee jaar
  • Adolessent: ongeveer vanaf ouderdom tussen 10 en14
  • Volwassene: ongeveer vanaf ouderdom 18

Hormone veroorsaak 'n wye reeks verandering in seuns en meisies.

Seuns: TESTOSTEROON Meisies: ESTROGEEN
  • Geslagsorgane groter
  • Geslagsorgane groter
  • Spiere groter en sterker
  • Heupe verbreed
  • Stem dieper – "stem breek"
  • Borste groter
  • Liggaamshare
  • Liggaamshare

Vrae en aspekte rondom adolessensie: GROEPBESPREKING

  • Sommige kulture vereis 'n inisiasieproses, afhangend van die kultuur en geloof. 'n Reeks rituele en seremonies moet deurleef word. Vind meer hieroor uit en wees sensitief daaroor.
  • Ander gelowe en kulture vereis besnydenis – op wisselende ouderdomme. Eweneens moet respek teenoor andere se sienswyses gehandhaaf word.

1. Wat is besnydenis?

2. Wat is inisiasie?

3. Wat is aknee? Hoe behandel jy dit?

4. Wat is groepdruk? Hoe hanteer jy dit?

Assessering: GROEPBESPREKING

Kan jy die rol van die mens in sy gemeenskap duideliker sien?

[LU 3.1]

Assessering

LU 2

Konstruksie van Wetenskapkennis

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

Dit is bewys as die leerder:

2.1 betekenisvolle inligting kan onthou;

2.2 inligting kan kategoriseer;

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 verstaan;

3.2 die volhoubare gebruik van die aarde se hulpbronne verstaan.

Memorandum

Groei, ontwikkeling en adolessensie

VRAE EN ASPEKTE RONDOM ADOLESSENSIE: GROEPBESPREKING

1. chirurgiese verwydering van voorvel van penis

2. reeks rituele en seremonies wat in sekere kulture gevolg word – sluit soms besnydenis in – manlik en vroulik

3. velprobleme agv oormatige olieafskeiding agv hormone; goeie basiese velroetine en medisinale rome en middels

4. druk tov kleredrag, gedrag, houdings en gewoontes uitgeoefen deur jou eie ouderdomsgroep en maats; besluit self deur goeie morele waardes as verwysingsraamwerk te gebruik; oorweeg ook ouer persone se lewenswysheid en ervaring

Questions & Answers

Leo Robinson's definition
Adejimi Reply
how is equilibrium defined in financial markets?
Babakura Reply
the concept of it
DALOM
Country A has export sales 20 billion, government purchases 1000billion, business investment is 50 billion, imports are 40billion, and consumption spending is 2000billin. What is the dollar value of GDP ?
Habtamu Reply
what is determination of national income?
Waqar Reply
economic growth
Rukaiya
stock of capital
Rukaiya
we're RBI keep money with them
Anil
Y =C+l
Favour
evaluate the success affirmative action as one of south Africa's redress method
Tebatso Reply
what is market equilibrium
explorer Reply
it is a situation in which the supply of an item is exactly equal to it dd .
Ssmith
inder wat condition shld a firm stop production in both short n lungrun ?
Ssmith
what is 2nd degree price discrimination?
Ssmith
what is quantity
Tettey
what is quantity2
Deji Reply
An indefinite amount of something.
explorer
what is demand
Kaman Reply
in ordinary sense demand means desire
Khalid
demand in economics means both willingness as well as the ability to purchase a commodity by paying a price an also its actuall purchase
Khalid
what is absolute advantage
Khalid
demand refers to the various quantity of goods and services that consumers are willing and able to purchase at a particular period of time all other things been equal
Dela
The amount of a good or service that consumers are willing to buy at a particular price.
explorer
what is cost pull inflation?
oru
what is utility
oru
what is cost pull inflation?
oru
demand is economic principle referring to a consumer's desire and willingness to pay a price for a specific or service..
Babakura
utility is the among of certisfaction driving from using a comundity
Anas
pull cost of inflation hight population unemployment to some of The country members poor government system
Anas
what is a buffer scheme
Lukong
state the second law of demand and supply
Ahmadou Reply
state the law of diminishing marginal utility
Ahmadou
dt know WATS the answer
Rukundo
mention and explain two Bank I financial institutions and two non baking financial institutions
Onah Reply
wat is demand pull inflation
Tony Reply
Demand-pull inflation is asserted to arise when aggregate demandin an economy outpaces aggregate supply. It involvesinflation rising as real gross domestic product rises and unemployment falls, as the economy moves along the Phillips curve.
kevin
Perfectly elastic demand
Abubakar Reply
this is a form of demand where goods are demanded at a constant price
Rukundo
what inelastic demanding
Koire
demand of any good demanded more after a certain period. if a commodity prices may high and scarcity of that resources.
Anil
cannot demand more
Anil
what is cross-elasticity of demand
Miles Reply
cross elasticity of demand is an economic concept that measures the responsiveness in the quantity demand of one good when a change in price takes place in other good
Mallekha
this is responsiveness quantity demanded keeping other factors constant
Rukundo
what economic growth
Rukundo Reply
conditions of perfect market
NdzAlama Reply
CONDITIONS OF PERFECT MARKET: 1. Perfect competition(PC): no increasing returns, many buyers and sellers, all are price takers, not prices makers. 2. Perfect Information (PI): buyers and sellers know all they need to know about what they are buying and selling to make the right decisions.
Mallekha
3. Complete Markets(CM): no externalities or public goods, no transactions costs, "thick" markets.
Mallekha
nice contributor
Mohammed
A numerous downsized market that does not meet standards.
LaTasha
A Perfect Market is a numerous downsized market that does not meet standards.
LaTasha
what is a market
Ahmadou
is place where buyers and sellers met together for the purpose of buying and selling of good and services
Babakura
Difference between extinct and extici spicies
Amanpreet Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
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
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
My ma het umfeseem en ha voete swel baie en sy kani uriene afslaan ni wat kan dit veroorsaak
Miggie Reply

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Source:  OpenStax, Natuurwetenskappe graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11068/1.1
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