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NATUURWETENSKAPPE

Materie en stowwe

Eienskappe en gebruike van materie

Opvoeders afdeling

Memorandum

Opdrag 2: (groepwerk)

MAGNETIESESTOWWE NIE-MAGNETIESESTOWWE
skuifspeld vuurhoutjie
speld knoop
R2-stuk
spyker
drukspyker
lemmetjie
  • (Daar kan nog baie ander voorbeelde ook wees – leerders kan die lys aanvul).

ASSESSERING

  • Lys die stowwe waaruit die volgende voorwerpe hoofsaaklik bestaan en dui aan of dit magneties (M) of nie-magneties (NM) is:
VOORWERP STOF WAARUIT DITBESTAAN MAGNETIES /NIE-MAGNETIES
R2-stuk nikkel magneties
skuifspeld yster/staal magneties
vuurhoutjie hout nie-magneties
brood graan nie-magneties
motor staal magneties
skeermeslemmetjie vlekvrye staal/yster magneties
potlood hout nie-magneties
R50-noot papier nie-magneties
kosblik plastiek nie-magneties
skoolhemp katoen nie-magneties
trui wol nie-magneties
mieliepap graan nie-magneties
mes vlekvrye staal magneties
skoen leer nie-magneties
sakdoek katoen nie-magneties
SLEUTEL: SELFASSESSERING
Alles korrek 4
Slegs twee verkeerd 3
Vyf verkeerd 2
Minder as vyf korrek 1

Opdrag 3:

WAARNEMINGS
Proefbuis 1 Die spyker begin roes.
Proefbuis 2 Die spyker roes nie, want die suurstof kan nie in die water ingaan nie omdat die olie die proefbuis seël.
Proefbuis 3 Die spyker roes vinniger, want daar is sout in die water.
Proefbuis 4 Die spyker kan nie roes nie, want daar is geen water in die proefbuis nie.
Proefbuis 5 Die kalsiumchloried maak die lug droog, m.a.w. daar is nie vog in die lug nie. Die spyker roes nie.
Proefbuis 6 Die spyker kan nie roes nie, want dit is met ‘n lagie olie bedek.
Proefbuis 7 Die spyker word met ‘n lagie sink bedek. Dit beskerm ‘n deel van die spyker – daardie deel sal nie roes nie. Die deel van die spyker wat nie bedek is nie, sal roes in die water.

Gevolgtrekking:

  • Water en suurstof is noodsaaklik vir yster om te roes. Sout bespoedig die proses.

ASSESSERING

  • (Summatief)

Gebruik nou die kennis wat jy opgedoen het en maak die volgende afleidings:

1. Hoekom is daar ‘n lagie olie bo-op die water in proefbuis 2?

Om die suurstof uit die water te hou sodat die spyker nie roes nie.

2. Die spykers in proefbuise 1 en 3 roes wel. Hoekom?

Daar is in proefbuise 1 en 3 suurstof en sout in die water opgelos.

3. Hoekom het proefbuis 5 ‘n rubberprop op?

Om die suurstof uit die proefbuis te hou sodat die spyker nie kan roes nie.

4. Watter vorm van roesbeskerming word voorgestel deur proefbuis 7?

Die spyker word met sink bedek.

Opdrag 4:

  • (Individueel)
Voorwerp 1 Voorwerp 2 Voorwerp 3
Voorwerp wat geroes het Hark
Plek waar voorwerp voorgekom het (binne/buite) Buite
Voorkoms van voorwerp (nat/droog) Nat
Is daar dele van die voorwerp wat meer geroes het as ander dele? Die handvatsel wat van plastiek gemaak is, roes nie.Die res van die hark roes, want dit is van yster gemaak.
Waarom het roes voorgekom? Dit het buite in die reën gestaan.Water laat yster roes.
  • (Daar kan nog baie ander voorbeelde wees.) Opdrag 5:
  • (Individueel)

1. Watter faktore sal jy in aanmerking neem wanneer jy ‘n nuwe stelsel moet aanbring?

  • Hoe lank gaan ek nog met die motor ry voordat ek dit verkoop?
  • Hoe oud is die motor?
  • Hoeveel geld het ek?
  • ens.

2. Watter uitlaatstelsel, dink jy, is goedkoper in die langtermyn?

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
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 6. OpenStax CNX. Sep 17, 2009 Download for free at http://cnx.org/content/col11080/1.1
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