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Natuurwetenskappe

Materie en stowwe

Eienskappe en gebruike van materie

Opvoeders afdeling

Memorandum

TIPEMATERIAAL METAAL KERAMIEK GLAS PLASTIEK VESEL
VOORBEELD ysterkoper steneornamente bottelsasbakkies plastiek-bakkies katoenpoliëster
  • (Daar kan nog baie ander voorbeelde wees).

Opdrag 10:

  • (Individueel)
Die koerantpapier en meel is natgemaak met water. Daarna is dit gemeng om ‘n nuwe stof, nl. papierpap(mâché) te kry. Deur hierdie proses het ons ‘n nuwe mengsel / mengelstof verkry.
Deur sekere stowwe te meng, kan ons nuwe produkte verkry.
  • (Daar kan nog baie ander antwoorde wees).

Opdrag 11:

  • (Individueel)
NATUURLIKE STOWWE SINTETIESE STOWWE
katoen, sy, wol, linne, ens. poliëster, akriel, viskose, glasvesel, ens.
  • (Daar kan nog baie ander voorbeelde wees).

Leerder afdeling

Inhoud

Aktiwiteit: om die belangrikste groepe materiale uit te ken [lu 1.2, lu 1.3, lu 3.2]

  • Materiale kan op verskillende maniere geklassifiseer word.
  • Kom ons kyk watter groepe julle reeds ken.
Tipe Materiaal Metaal: Keramiek: Glas: Plastiek: Vesel:
Voorbeeld ____________ ____________ ____________ ____________ ____________

Mengsels / Mengelstowwe

Nuwe produkte word gevorm wanneer ons verskillende soorte materie kombineer. Ons kombineer bv. water, melk, suiker en koffiepoeier om ‘n koppie koffie te maak. Ons kan stowwe ook op verskillende maniere kombineer deur dit te meng. Die voorkoms en tekstuur van die produk verskil gewoonlik van die oorspronklike stowwe. Nog ‘n voorbeeld van ‘n mengsel is veiligheidsglas. In hierdie geval word dun plastieklagies tussen lae glas gesmelt.

Opdrag 10 (Individueel)

  • Om iets te maak deur stowwe (materiale) te kombineer.

Wanneer ons koerantpapier, meel en water kombineer, kry ons papier-mâché om dinge mee te maak. Maak nou jou eie dinosourus op die volgende manier:

Benodigdhede :

Water

Meel

Metaaldraad

Tang

Koerantpapier

Verf en kwaste

Tou

Stappe:

  • Meng een koppie meel met drie koppies water.
  • Roer die mengsel totdat dit glad en romerig is.

Hoe om ‘n draadraam vir die dinosourus te maak :

  • Bend the wire into the shape of a dinosaur with the pair of pliers.
  • Fasten the legs and tail to the body with a piece of string.
  • The frame should be able to stand on its own.
  • Buig die draad in die vorm van die dinosourus met ‘n tang.
  • Heg die voorbene, agterbene en stert aan die lyf met ‘n stukkie tou.
  • Die raam moet op sy eie kan staan as dit voltooi is.

Voltooiing:

  • Skeur die koerantpapier in lang stroke.
  • Week hierdie stroke koerantpapier in die pasta.
  • Gebruik die deurweekte stroke om die draadraam op te bou.
  • Laat die figuur droog word.
  • Voltooi jou dinosourus deur dit te verf.

Gevolgtrekking:

Beskryf in jou eie woorde watter veranderinge die koerantpapier en meel ondergaan het.

_____________________________________________________________________

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Die meeste klere word deesdae ook van ‘n mengsel van stowwe vervaardig. Ons kombineer bv. sintetiese stowwe met natuurlike stowwe.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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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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