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Lewensoriëntering

Graad 4

Gesondheid!

Module 3

‘n gesonde omgewing en persoonlike gesondheid

Die verband tussen ‘n gesonde omgewing en persoonlike gesondheid

Wees slim in die son

Ons bly in ‘n land wat bekend is vir sy wonderlike sonskynweer. Die son kan ‘n mens baie goed laat voel en jou liggaam help om gesonde vitamine te vervaardig. Die mens kan ook die warm strale van die son inspan om vrugte, byvoorbeeld perskes, en groente soos tamaties, te droog en sodoende te preserveer. Wetenskaplikes gebruik sonstrale om krag op te wek wat gebruik kan word in plaas van elektrisiteit. Ons noem dit sonenergie.

Die son kan ook skade aanrig. Wanneer mense gereeld in die hitte van die dag (bv. 12:00) op die strand in die son lê en sonbrand, word die vel sodanig beskadig dat ‘n mens later velprobleme, bv. velkanker, kan opdoen. As ‘n mens té strawwe oefening in die warm son doen sonder om water te drink, loop jy die gevaar om te dehidreer (ontwater). Dit beteken dat jou liggaam te veel vog verloor en jy dan naar en siek begin voel. Meeste soorte plante verskroei in die warm son, veral as daar nie genoeg vog in die grond is nie.

Aktiwiteit 1

Om ‘n toeristebrosjure te ontwerp [lu 1.2]

Plak ‘n fotokopie, of die werklike pamflet wat julle groep gemaak het om ‘n vakansie in die sonnige Suid-Afrika te adverteer, in jul modules.

Aktiwiteit 2

Om ‘n lys van “sonveilige” reëls te maak [lu 1.2]

Maak ‘n lys van ten minste vyf goue reëls waarmee toeriste rekening moet hou wanneer hulle gedurende die somer in ons sonnige land vakansie hou.

Assessering

LEERUITKOMS 1: GESONDHEIDSBEVORDERING

Die leerder is in staat om ingeligte besluite oor persoonlike, gemeenskaps-en omgewingsgesondheid te neem.

Assesseringstandaard

Dis duidelik wanneer die leerder

1. 2 verslag en ondersoek doen oor die verhouding tussen ‘n gesonde omgewing en persoonlike gesondheid.

Questions & Answers

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
Do somebody tell me a best nano engineering book for beginners?
s. Reply
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
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
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
I'm interested in nanotube
Uday
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
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit 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, Lewensorientering graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11095/1.1
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