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Natuurwetenskappe

Energie-oordrag en stelsel

Bronne van energie en energiesisteme

Opvoeders afdeling

Memorandum

Staties:

  • Winkeltrollies het ‘n kettinkie wat op grond sleep. Ladings vloei in die grond in.
  • Ontstaan wanneer iets vryf en daar weerstand is, bv. hande op ‘n handvatsel, klere op sitplek, ens.

Weerlig:

Enige voorbeelde, bv.

  • Moenie voor oop deure en vensters staan nie.
  • Dra skoene met rubbersole.
  • Bly weg van draadheinings.
  • Lê plat, moet nooit regop staan of op ‘n voorwerp staan nie.
  • Installeer weerligafleiers.

Moenie oor die telefoon praat as daar donderweer is nie.

Leerder afdeling

Inhoud

  • Die natuurlike energiebronne soos die son, wind en water wat reeds behandel is, voorsien net gedeeltelik in die energiebehoeftes van die mens. Daar is oor die afgelope jare min aandag gegee aan die ontginning van hierdie energiebronne, juis omdat dit moeilik is om hierdie energiebronne op te vang, te berg en te beheer. Die volgende hulpbronne word hoofsaaklik gebruik om in die mens se energiebehoeftes te voorsien.

Kernkrag is die nuutste en gevaarlikste tipe brandstof beskikbaar.

Vervolgens gaan ons na die bronne van elektriese energie kyk. Ons let veral op die volgende:

Statiese elektrisiteit en weerlig

Selle

Batterye

Dinamo’s

Steenkoolaangedrewe kragstasies

Kernkrag

Jy het in Graad 5 reeds met sommige van hierdie bronne kennis gemaak. Hierdie jaar kyk ons in meer besonderhede daarna. Ons gaan jou ook help om te verstaan wat energiesisteme is en hoe sommige van die bronne as sisteme beskryf kan word.

Onthou intussen die volgende definisie vir 'n sisteem:

'n Sisteem bestaan uit twee of meer dele wat saamwerk of mekaar beïnvloed.

Aktiwiteit: om statiese elektrisiteit en weerlig as bronne van energie te kan beskryf [lu 2.3]

  • Statiese elektrisiteit

Ons het reeds geleer dat statiese elektrisiteit altyd in die lug rondom ons teenwoordig is. Statiese elektrisiteit is nie baie sterk nie, maar ons kan dit d.m.v. wrywing sterker maak.

Statiese elektrisiteit kan ons ook soms ‘n onaangename skok gee. Metaaltrollies by winkels is so gemaak dat hulle die statiese elektrisiteit wat in hulle opbou, na elders gelei.

  • Bespreek die manier van geleiding in jul groepe.

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  • Hoe ontstaan statiese elektrisiteit?

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  • WEERLIG

Julle het reeds geleer dat alle materiale uit klein deeltjies bestaan. Sulke deeltjies is soms met elektrisiteit gelaai. Deeltjies kan óf positief óf negatief gelaai wees. Elektrisiteit kan opgewek word as negatief gelaaide deeltjies van een plek na ‘n ander beweeg. Partymaal kan die vloei van elektrisiteit as ‘n vonk waargeneem word. Weerlig is ‘n groot hoeveelheid elektrisiteit wat as ‘n vonk in die lug gesien kan word. ‘n Mens kan sê dat weerlig veroorsaak word as groot hoeveelhede negatief gelaaide deeltjies van een wolk na ‘n ander of van 'n wolk af grond toe beweeg.

  • Skryf ‘n paar voorsorgmaatreëls neer wat ons moet nakom as daar ‘n donderstorm is.

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Assessering

Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder inligting interpreteer.

Questions & Answers

Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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
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
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
hi
Loga
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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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