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Natuurwetenskappe

Graad 4

Materie en stowwe

Module 56

Die waarde van boumateriaal as 'n hulpbron

Aktiwiteit:

Om die waarde van boumateriaal as ‘n hulpbron in die bou van huise te leer ken

[lu 1.2.1, 2.2.1, 3.2]

Boumateriale

Wanneer ‘n huis gebou word, word materiale gebruik wat natuurlik is of wat gemaak moes word. Hier is ‘n prentjie van ‘n huisie. Kleur die natuurlike materiale geel in en die ander materiale rooi.

Hout

Een van die natuurlike produkte wat gebruik is om die huisie te bou, is hout.

Hout is ‘n wonderlike hulpbron vir die mens. Deel die klas in ses groepe. Gee drie minute kans om alles te lys wat van hout gemaak is in die:

klas

jou kamer by die huis

jou sitkamer by die huis

die kombuis

op die skoolterrein

I

in die skoolsaal

1. Watter gevolgtrekking kan jy hieruit maak?

My gevolgtrekking is: ____________________________

  1. Skryf aan Sappi om plakkate aan julle klas te stuur.

Bakstene

Om mee te skryf

Duisende jare gelede het mense allerhande maniere gebruik om te skryf. Hulle het materiale van dierprodukte, klippe, plante en klei gebruik. Hulle het op papirus, bas, dierevelle en rotse geskryf en tekeninge gemaak.

Vandag is dit baie makliker. Ons gaan net eenvoudig winkels toe en koop die wonderlikste skryfgoed wat ons wil hê. Al hierdie goed word van verskillende soorte materie gemaak.

Dink aan iemand uit ons verre verlede wat jou nog altyd gefassineer het. Stuur ‘n kort SMS-boodskap aan hom/haar om te bewys hoe die tegnologie oor ‘skryf’ deur die jare verander het.

Assessering

LEERUITKOMS 1: WETENSKAPLIKE ONDERSOEK

Die l eerder is in staat om met selfvertroue op weetgierigheid oor natuurlike verskynsels te reageer, en om binne die konteks van wetenskap, tegnologie en die omgewing verbande te ondersoek en probleme op te los.

Assesseringstandaard

Dis duidelik wanneer die leerder

1.2 ondersoeke uitvoer en data versamel, bv.:

1.2.1 merk ooglopende veranderings of interessante besonderhede op en lewer kommentaar daarop.

LEERUITKOMS 2: KONSTRUKSIE VAN WETENSKAPKENNIS Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewings- kennis toe.

Assesseringstandaard

Dis duidelik wanneer die leerder

2.2 inligting kategoriseer, bv.:

2.2.1 volg instruksies om diere in groepe van dié met twee bene, met vier bene en met meer as vier bene te sorteer.

LEERUITKOMS 3: WETENSKAP, DIE SAMELEWING 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 .

Assesseringstandaard

Dis duidelik wanneer die leerder

3.2 die impak van wetenskap en tegnologie verstaan.

Memorandum

Boumateriale:

  • Natuurlike materiale: kleur dit geel in
  • Ander materiale: kleur dit rooi in

Om mee te skryf:

  • Kinders ken nie die outydse maniere van skryf nie. Indien daar tyd is, lees outydse artikels, stories of kyk video’s wat dit mooi uitbeeld.
  • Die SMS-boodskap is iets wat hulle baie goed ken!

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, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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