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Natuurwetenskappe

Energie-oordrag en kragte

A. kragte

Opvoeders afdeling

Memorandum

Leerder afdeling

Inhoud

Aktiwiteit: om verslag te doen oor ‘n menslike prestasie in die wetenskap [lu 3.1]

Omdat Mark Shuttleworth beskou kan word as ‘n baanbreker op dié gebied, was die koerante en tydskrifte vol artikels oor die groot gebeurtenis. Gebruik dit as bronne en skryf ‘n verslag van ± twee foliobladsye oor die reis. Nog meer interessante inligting en foto’s is beskikbaar op die volgende webtuiste: http://www.africaninspace.com .

Riglyne vir die samestelling van die inhoud van jou verslag:

1. Mark Shuttleworth en sy drome en ideale

2. Voorbereiding vir die reis

3. Redes vir die reis

4. Die reis self

5. Wat beteken dit vir die mens, asook vir Suid-Afrika?

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B. Magnetisme

Daar word vertel dat die Grieke meer as 2 000 jaar gelede ‘n snaakse soort klip ontdek het. Magnes, ‘n skaapwagterseuntjie, het eendag terwyl hy skape opgepas het, opgemerk dat die ysterpunt van sy staf so sterk deur ‘n groot swart klip aangetrek word dat hy dit glad nie kon loskry nie. Volgens die fabel is die woord ‘magneet’ afgelei van die seuntjie se naam. Dit is natuurlik nie moontlik om te bewys dat die fabel waar is nie, maar dit is wel ‘n feit dat sekere soorte swart klippe soortgelyke klippe en sekere metale aantrek. Baie van hierdie soort klip is naby Magnesia in Turkye gevind en word magneetsteen genoem. Die woord ‘magneet’ is dus heel moontlik afgelei van hierdie stad se naam. Hierdie klippe is natuurlike magnete. Ons gebruik vandag kunsmatige magnete wat van yster of staal gemaak is. Hierdie magnete word vervaardig om voorwerpe baie sterk aan te trek en hul magnetisme lank te behou. In jul skool se laboratorium sal jy heel moontlik magnete van vier verskillende vorms vind:

Staafmagneet
Hoefmagneet
Silindriese magneet
Ringmagneet

Magnete moet versigtig hanteer word, anders verloor hulle hul magnetisme.

Onthou altyd die volgende wanneer jy met magnete werk:

  • Moenie magnete hardhandig gebruik nie, d.w.s. moenie dit kap of laat val nie.
  • Moenie magnete verhit nie.
  • Bêre altyd magnete met hul sluitstukke in posisie.

1. Magnetiese stowwe en nie-magnetiese stowwe

Nie alle voorwerpe sal deur ‘n magneet aangetrek word nie. Om vas te stel watter stowwe magneties en watter stowwe nie-magneties is, gaan ons die volgende eksperiment doen.

Assessering

Learning Outcome 3: Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Assessment Standard 3.1: Dit is duidelik wanneer die leerder wetenskap as ‘n menslike aktiwiteit verstaan: vergelyk verskillende interpretasies van gebeurtenisse.

Questions & Answers

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
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
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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