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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:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

  • 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

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
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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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