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Natuurwetenskappe

Materie, meting en reaksies

Materie en meting

Opvoeder afdeling

Memorandum

  • Organies: lewende; anorganiese: nie-lewende
  • Waarneming: Die asyn het gereageer met die melk en ‘n ‘nuwe’ stof met ‘nuwe’ eienskappe is gevorm.
  • Gevolgtrekking: Die spesiale eienskappe van melk en asyn is gebruik om ‘n nuwe sintetiese stof te vervaardig.
  • Gebruike van ‘nuwe’ stof: As prop om iets te verseël; beskerming; versiering, ens.
  • Soos in gegewe illustrasie, maar met die houers wat gebruik is en die bron van hitte (doel: oefen die leerder se vermoë om dit wat hy waarneem met ‘n tekening voor te stel.)

Leerder afdeling

Inhoud

Aktiwiteit: om plastiek as ‘n voorbeeld van sintetiese of mensgemaakte stowwe te ondersoek [lu 1.2, lu 1.3]

Plastiek is ‘n mensgemaakte stof. Plastiek word gemaak omdat dit spesiale eienskappe het en omdat dit goedkoper is om te vervaardig as om natuurlike stowwe te vind. Plastiek is byvoorbeeld sterk en waterdig. Dit kan baie nuttig gebruik word in verpakkings en as beskerming vir ander stowwe dien.

EKSPERIMENT: MAAK JOU EIE PLASTIEK

Alhoewel die meeste soorte plastiek van petroleumolie gemaak word, kan ‘n soortgelyke plastiek vervaardig word deur melk te gebruik. Melk bevat koolstof en kan dus as ‘n organiese stof geklassifiseer word.

  • Slaan die betekenis van “organiese” in die woordeboek na.

_____________________________________________________________________

BENODIGDHEDE:

20ml asyn;

‘n kookpot;

200 ml volroom melk

METODE:

  • Gooi die melk in die pot en bring dit stadig tot kookpunt.
  • Voeg 20 ml asyn by die melk.
  • Hou aan met roer totdat die mengsel rubberagtig word.
  • Verwyder dit van die hitte en laat dit deeglik afkoel.
  • Spoel die mengsel af met water.

WAARNEMING

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

GEVOLGTREKKING:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

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  • Moontlike nuttige gebruike van die “nuwe” stof:

_____________________________________________________________________

_____________________________________________________________________

  • Gebruik die woordelikse beskrywing van die eksperiment en maak ‘n skets of diagrammatiese voorstelling van die eksperiment.

ASSESSERING

LU PUNTE VLAK VLAKAANDUIDER
1 Minder as 5 1 Die skets/voorstelling maak geen sin nie, met geen waarneming en gevolgtrekking nie
5 – 7(25% – 39%) 2 ‘n Basiese voorstelling met baie min waarneming en geen gevolgtrekking nie
8 – 13(40% – 69%) 3 ‘n Bevredigende voorstelling/skets met basiese waarneming, maar amper geen gevolgtrekking nie
14 – 20(70% – 100%) 4 ‘n Volledige voorstelling met byskrifte van die eskperiment met waarmeming en gevolgtrekking

Assessering

Leeruitkomste 1: Die leerder 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 1.2: Dit is duidelik wanneer die leerder ondersoeke uitvoer en data versamel: organiseer en gebruik apparaat/toerusting of bronne om inligting in te win en te noteer;

Assesseringstandaard 1.3: Dit is duidelik wanneer die leerder data evalueer en bevindings kommunikeer: veralgemeen in terme van relevante aspekte en beskryf hoe die data die veralgemening onderskryf.

Questions & Answers

what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
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
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
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
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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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