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Aktiwiteit 2:

Om te besin oor noodmaatreëls in vulkaniese gevaargebiede

[lu 2.3]

1. Hoekom besluit mense om te woon in gebiede waar daar vulkaniese uitbarstings voorkom ? Dink goed hieroor na en gee dan jou opinie.

2. Verbeel jou jy bly in ‘n area waar daar vulkaniese uitbarsting voorkom. Stel ‘n lys met noodmaatreëls op wat in werking gestel moet word voor, tydens en na ‘n uitbarsting.

3. Versamel koerantberigte oor enige onlangse vulkaniese uitbarsting. Hou klasbesprekings daaroor en noem die gevolge wat dit gehad het.

4. Watter hulp is deur die eerstewêreldlande aan hierdie mense gebied? Kon meer gedoen word?

Interessante feit

Die ontsaglike krag wat in ons aarde se ingewande voorkom, laat ‘n mens eintlik bang word en laat jou aan die dood en verwoesting wat dit saai, dink.

Kom ons sluit egter positief af. Dalk kan ons nog eendag dié kragte inspan vir ‘n geriefliker lewe op aarde. Ons kan dalk maniere vind om hierdie krag te tem en elektrisiteit daarmee op te wek. Dink aan die impak wat so ‘n nuwe energiebron op ons bestaan kan hê!

‘n Webblad soos die volgende bevat nogal interessante inligting oor vulkane:

(External Link)

Assessering

Leeruitkomstes(LUs)
LU 2
AARDRYKSKUNDIGE KENNIS EN BEGRIPDie leerder is in staat om aardrykskundige en omgewingskennis en -begrip te toon.
Assesseringstandaarde(ASe)
Dit is duidelik wanneer die leerder:
2.1 beskryf en verduidelik hoe natuurgevare soos vulkane, aardbewings en oorstromings plaasvind, en die uitwerking daarvan op menselewens en op sosio-ekonomiese bedrywighede [mense en plekke];2.2 ondersoek en verduidelik waarom sommige mense meer as ander aan natuurgevare blootgestel is [mense en hulpbronne];2.3 identifiseer hoe risiko’s en natuurgevare hanteer kan word [mense en omgewing].

Memorandum

Aktiwiteit 1:

1. a) Die mens

  • Lawa verteer en /of laat huise en stede verkrummel.
  • Mense word deur die lawa verswelg.
  • Ander word deur die verstikkende swaelgasse en asreën verswelg en versmoor.
  • Mense verdrink as gevolg van tsoenami’s wat oor laagliggende gebiede ingespoel word.

b) Die natuur

  • Die natuurlike omgewing word geheel en al verwoes of verander deur ‘n vulkaan.
  • Rotse en as wat die lug ingeslinger word, veroorsaak lugbesoedeling.
  • Lawa vloei oor vrugbare valleie en verteer alle plantegroei.
  • Vuurwarm modderstrome verswelg stede en mense.
  • Tsoenami’s ontstaan in die see en kan laagliggende gebiede en eilande oorstroom.
  • Nuwe eilande ontstaan as gevolg van vulkaanuitbarstings onder die see.
  • Die natuurlike omgewing word omskep in iets nuuts. Stollingsgesteentes ontstaan, wat oor miljoene jare baie vrugbare grond vorm vir voedselproduksie.
  • Edelgesteentes word in stollingsgesteentes gevorm, soos diamante. Dit kan groot finansiële implikasies vir ‘n land inhou.
  • Warmwaterbronne is volop naby vulkane en lok toeriste. Die warm water word ook vir verhitting van geboue aangewend.

2. Leerders bring foto’s, prentjies en uitknipsels van vulkane na die klaskamer. Hou ‘n klasbespreking en vul aantekeninge aan.

Aktiwiteit 2:

1. Mense neem ‘n bewuste besluit om naby ‘n vulkaan te bly.

Ekonomiese oorwegings soos werkvoorsiening en finansiële welvaart tel baie keer meer as die potensiële gevaar van ‘n nabygeleë vulkaan.

2. a) Voor ‘n vulkaniese uitbarsting

  • Vulkane word deur seismograwe gemonitor en waarskuwings word uitgereik.
  • Areas moet ontruim word, indien voortekens voorkom.
  • Mense woonagtig in sulke areas moet altyd sorg dat hul noodvoorrade byderhand het.

b) Tydens ‘n vulkaniese uitbarsting

  • Mense moet so vinnig as moontlik uit die area wegkom.
  • Luister gedurig na nuusberigte sodat die verloop van die uitbarsting gevolg kan word.
  • Dra gasmaskers as beskerming teen swaelgasse.

c) Na ‘n vulkaniese uitbarsting

  • Opruiming van die area moet geskied en hulpverskaffing moet verleen word deur eerstewêreldlande.

3. Versamel koerantberigte oor enige onlangse vulkaniese uitbarsting en hou ‘n klasbespreking.

4. Eerstewêreldlande verleen finansiële hulp na so ‘n ramp.

Hulle stuur ook so spoedig moontlik noodspanne om te help met opruiming, mediese dienste en voedselvoorsiening.

Questions & Answers

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.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
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
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
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Aardrykskunde graad 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11020/1.1
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