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Waarom?

  1. Verhit die koperbal in die vlammetjie. Probeer die bal deur die ring sit. Wat gebeur? Verklaar.
  1. Hou die koperbal in koue water en probeer dit weer deur die ring sit. Wat gebeur? Verklaar.

Voltooi:

Alle vaste stowwe sit nie eweveel uit as dit ___________________nie, en

krimp nie eweveel as dit ________________nie.

Nog interessanthede:

Die betonblokke van sypaadjies en brugkonstruksies word altyd met spasies tussenin gelê. Waarom?

'n Tandarts kan nie sommer enige stof as stopsel vir jou tand gebruik nie.

Verduidelik:

Assessering

LU 1

WETENSKAPLIKE ONDERSOEK 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.

Dit is duidelik wanneer die leerder:

1.1 ondersoeke beplan: ‘n lys opstel, met ondersteuning, van bekende situasies en materiale, en ondersoekende vrae opstel:

1.1.1 bydra tot ‘n klaslys van interessante aspekte van die situasie;

1.2 ondersoeke uitvoer en data versamel: instruksies en prosedures uitvoer wat ‘n klein aantal stappe behels:

1.2.1 ‘n eenvoudige werkblad volg om toerusting op te stel en waarnemings te verkry;

1.2.2 waarnemings aanteken deur tekeninge en byskrifte te maak;

1.2.3 met die prosedure aanhou totdat die verskynsel plaasvind of oor ‘n langer tydperk waargeneem kan word (bv. plante groei na die lig wat van ‘n spieël af kom);

1.3 data evalueer en bevindings kommunikeer: verslag doen oor die groep se prosedure en die resultate wat verkry is:

1.3.1 waarnemingsdata aanbied wat met die fokusvraag verband hou.

LU 2

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

Dit is duidelik wanneer die leerder:

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

2.1.3 sê of energie van een vorm na ‘n ander oorgeskakel kan word.

Memorandum

AKTIWITEIT 1

Verfris jou geheue: vloeistof, vaste stowwe, gasse (in hierdie volgorde).

AKTIWITEIT 2

Draai moeilik oop: Toe die kos ingelê is, was dit warm. Die deksel is styf vasgedraai. Omdat dit van metaal is, het dit gekrimp toe dit afkoel. Die kos het ook gekrimp. Die deksel het dus verklein en is deur die inkrimpende kos vasgesuig.

Warm water laat dit maklik oopdraai: vastestowwe sit nie eweveel uit nie. Die deksel is van metaal en sit meer uit as glas. Toe die warm water oor die bottel spoel, het die deksel meer uitgesit as die glas en dus makliker losgedraai.

Nommerpas-ruit: die ruit kan bars omdat dit uitsit as dit warm word en teen die raam druk.

Telefoondrade: die drade word langer as dit warm is. Hulle is dalk op ‘n koue dag gespan en as dit dan warm word, hang hulle slap.

Saamgestelde staaf:

1. Die staaf buig.

2. Koper.Koper sit vinniger uit as yster. Dit word dus langer as die yster en die buiging is dus na die yster se kant toe.

3. Die bal gaan nie, deur nie want dit het uitgesit weens verhitting.

4. Die bal het afgekoel en gekrimp.

Vul in:

Verhit word, afgekoel word.

Interessanthede:

Beton sit uit as dit warm word. Dit gaan dus bars om uit posisie te beweeg as dit nie spasie het om te beweeg nie. Dit moet ‘n stof wees wat soos die tande op hitte reageer, anders sit dit vinniger uit of krimp dit vinniger. Dit sal veroorsaak dat dit loskom, of die tand kan kraak.

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
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Sherica
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Sherica
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what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
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algebra 2 Inequalities:If equation 2 = 0 it is an open set?
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or infinite solutions?
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The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
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Mary Reply
is it 3×y ?
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J, combine like terms 7x-4y
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im not good at math so would this help me
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yes
Asali
I'm not good at math so would you help me
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Porter
many many of nanotubes
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what is the function of carbon nanotubes?
Cesar
what is nanomaterials​ and their applications of sensors.
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what is nano technology
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what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
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AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
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Source:  OpenStax, Natuurwetenskappe graad 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10980/1.2
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