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Huise van klei: mens en dier

  • Termiete bou groot neste van klei wat ‘n aantal meters bo die grond uitstaan. Die klei bak hard in die son van die tropiese lande waar hierdie termiete voorkom.
  • In Afrika, Sentraal-Amerika en die suidelike state van die VSA word huise vandag nog van klei gebou. Kleistene en hout vorm die struktuur van die huis. Dan word meer klei oor die raamwerk gepak en gelos om in die son droog te bak. ‘n Baie interessante feit is dat kleihuise 30% – 40% energie bespaar in areas waar die dae warm en die nagte koel is. Die klei absorbeer hitte gedurende die dag en stel dit vry in die nag; dus word ‘n gemaklike temperatuur in die huis ervaar.
  • Sekere voëls maak ook gebruik van klei om hul neste te bou.

Opdrag 2:

Soek inligting en gee skriftelike terugvoering oor ‘n voël wat klei gebruik om sy nes te bou.

  1. Soort voël:
  2. In watter land kom hierdie voëlspesie voor?

3. Waar bou die voël sy nes?

4. Maak ‘n eenvoudige skets van die: a) voël

b) nes

  1. Watter voordele bied die klei-nes?

Totaal: 10

3. Metale

Uit al die groepe materiale wat gebruik word om goed te maak, is metale een van die belangrikste. Daar is bepaalde funksies waarvoor slegs metaal gebruik kan word. In sulke gevalle kan geen ander materiaal as plaasvervanger gebruik word nie. Kyk om jou heen en sien hoe jou lewe van soggens vroeg tot saans laat van metale afhanklik is. Dink maar net aan vervoer en boerdery-implemente. Die eerste metaalvoorwerpe het reeds 9500 v.C. bestaan: goud, silwer, koper en yster.

Metale kan aan hul voorkoms herken word:

Metaalvoorwerpe blink gewoonlik.

Metale is goeie geleiers van hitte en elektrisiteit.

Baie is geskik vir die produksie van klank. Dit lui byvoorbeeld as jy daarteen slaan. Kerkklokke word van brons gemaak.

Metale kan in enige vorm gegiet word. Lood is ‘n metaal wat sag en buigbaar is. Velle lood is veral vroeër op dakke gebruik, veral die dakke van kerke en skole.

Staal is ‘n mengsel van yster en ander bestanddele. Munte is ook van ’n metaalmengsel gemaak.

Interessante feite:

Die boom van ‘n kastrol moet ‘n goeie geleier van hitte wees.

Nie alle metale is geskik vir die kook van kos nie.

Gegote yster, vlekvrye staal, aluminium, staal en koper word vir die vervaardiging van kastrolle gebruik.

As staal in die reën gelos word, sal dit roes. Water en suurstof in die lug het ‘n uitwerking op die yster in die staal om ‘n nuwe stof te vorm, naamlik roes.

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;

1.2 ondersoeke uitvoer en data versamel;

1.3 data evalueer en bevindinge kommunikeer.

LU 3

WETENSKAP, DIE SAMELEWING EN DIE OMGEWING Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon .

Dit is duidelik wanneer die leerder

3.1 wetenskap en tegnologie in die konteks van geskiedenis en inheemse kennis verstaan: identifiseer wyses waarop produkte en tegnologieë uit ander tye en kulture aangepas is;

3.2 die impak van wetenskap en tegnologie verstaan: identifiseer die positiewe en negatiewe effekte van wetenskaplike ontwikkelinge of tegnologiese produkte op mense se lewenskwaliteit en/of die omgewing.

Memorandum

Navorsing

Opdrag 1:

Vrae:

  1. Die pot kan water hou.
  2. Die ruimte tussen die deeltjies klei is nou so klein omdat dit drooggebak is, dat dit nie meer water deurlaat nie.
  3. ja
  4. Bakke vir oonde Blompotte

Tuinpotte

Breekgoed – borde, koppies, ens.

  1. Om huise te bou.

Om kleipotte te maak vir water, ens.

Opdrag 2:

Navorsing: voël, bv. swaeltjies (sien assesseringsrubriek)

Roes: water + suurstof = roes

Questions & Answers

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
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
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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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