<< Chapter < Page Chapter >> Page >

Natuurwetenskappe

Graad 5

Energie en verandering

Module 31

Vorms van energie

Aktiwiteit 1:

Om tussen verskillende vorms van energie te kan onderskei

[lu 2.1]

  • Jy het reeds in graad 4 bewus geword van die belangrikste bron van energie, naamlik die son.

Die energie van die son bereik ons in die vorm van bestraling, lig en hitte.

Kom ons kyk nou in watter ander vorms energie voorkom.

Energie in gestoorde vorm

Die energie van die son is deur die plant opgeneem en in voedsel gestoor. Energie kom dus in gestoorde vorm in voedsel voor. Diere en mense eet die plant as voedsel en gebruik die energie. Plante wat miljoene jare gelede nie deur diere gevreet is nie, het weens bepaalde omstandighede in steenkool verander. Gestoorde energie kom dus ook in steenkool en olie voor.

Energie word ook in elektriese selle (batterye) gestoor. Wanneer die sel aan 'n gloeilampie gekoppel word, word die energie vrygestel.

Bewegingsenergie

Energie kan gebruik word om beweging te laat plaasvind, byvoorbeeld 'n mens wat hardloop, 'n wiel wat rol of 'n enjin wat loop. Ons kan ook van meganiese energie praat.

Klankenergie

Klank bereik jou oor in die vorm van golwe in die lug. Die golwe laat jou oordrom vibreer en jou brein neem die vibrasie waar as klank. Ons kan van die energie wat die vibrasie veroorsaak, praat as klankenergie.

Elektriese energie

'n Elektriese stroom is 'n hoeveelheid energie wat van een punt na 'n ander vloei en die sterkte van die stroom (hoeveelheid energie) word in ampères (A) gemeet.

Atoomenergie

Jy het beslis al van kernkrag en kernkragsentrales gehoor. Kernkrag verwys na die energie wat in atome voorkom. Atome is die kleinste deeltjies waaruit 'n stof opgebou is. 'n Stof is iets wat sigbaar is of iets wat massa het en geweeg kan word, byvoorbeeld goud, water en koper. Het jy al gehoor van uraan?

Die omskakeling van energie van een vorm na 'n ander

Jy het nou iets geleer oor verskillende vorms waarin energie voorkom. Dink jy energie wat in 'n bepaalde vorm voorkom, kan na 'n ander vorm omgeskakel word? Gebruik twee van die voorbeelde wat ons gebruik het om hierdie vraag te beantwoord.

Assessering

LU 2

KONSTRUKSIE VAN WETENSKAPKENNIS Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Dit is duidelik wanneer die leerder:

  • betekenisvolle inligting onthou: ten minste eie vlotste taal gebruik om voorwerpe, materiaal en organismes te noem en te beskryf.

Memorandum

Omskakeling van energie: Ja. Daar is baie voorbeelde, bv.

Sonligenergie wat deur plante gebruik word vir voedsel. Dus hitte-/lig-/stralingsenergie omgeskakel na gestoorde energie;

Energie in gestoorde vorm kan na enige ander vorm omgeskakel word;

Elektriese energie word omgeskakel na lig-/warmte-energie;

Elektriese energie kan omgeskakel word na klankenergie;

Atoomenergie kan na elektriese energie omgeskakel word.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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
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
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natuurwetenskappe graad 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10980/1.2
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 5' conversation and receive update notifications?

Ask