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3.1 Om die opbreek van verbindings in eenvoudiger stowwe te ondersoek

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Natuurwetenskappe

Materie, meting en reaksies

Materie en meting

Opvoeder afdeling

Memorandum

Groepwerk:

Waarneming: Die gloeiende houtsplinter slaan aan die brand omdat suurstof afgegee is.

Gevolgtrekking: Kwikoksied is ‘n verbinding wat ontbind het as gevolg van die verhitting. Dit het opgebreek in suurstof wat ‘n gas is en kwik wat ‘n metaal is.

Kwikoksied = kwik + suurstof

Leerder afdeling

Inhoud

Aktiwiteit: om die opbreek van verbindings in eenvoudiger stowwe te ondersoek [lu 1.2, lu 1.3]

Groepwerk:

Om vas te stel of kwikoksied wel ‘n verbinding is wat uit elemente bestaan, doen die volgende eksperiment in groepe. Voer die verskillende stappe noukeurig uit:

  • Gooi ‘n bietjie kwikoksied wat rooi van kleur is in ‘n proefbuis.
  • Verhit dit oor ‘n bunsenbrander of kers in ‘n goed geventileerde vertrek.
  • Wag totdat die kwikoksied swart word en fyn kwikdruppeltjies aan die koeler kant van die proefbuis verskyn.
  • Steek ‘n gloeiende houtsplinter bo in die proefbuis in. ‘n Reaksie ontstaan.

Waarneming: _________________________________________________________

____________________________________________________________________

____________________________________________________________________

Gevolgtrekking: __________________________________________________________

____________________________________________________________________

____________________________________________________________________

Assessering

PUNT VLAK SAMEWERKENDELEERVAARDIGHEDE WAARDES EN HOUDINGS INHOUD
1-34% 1 Elkeen leer op sy/haar eie. Deelname in die groep is afbrekend, bv. oorheersend. Geen agting vir ander. Afbrekende, interpersoonlike verhoudings (negatief aktief). Kan nie sinvolle waarnemings en gevolgtrekkings maak nie.
35-39 % 2 Dra nie tot die groep by nie of vorm nie ‘n betekenisvolle deel daarvan nie. Geen agting vir ander, maar dit beïnvloed nie interpersoonlike verhoudings nie (negatief passief). Waarnemings en gevolgtrekkings redelik goed.
40-69% 3 Erken as lid van die groep. Sensitief vir ander se behoeftes. Agting vir ander en begrip vir ander standpunte, maar dit beïnvloed nie interpersoonlike verhoudings nie (positief passief). Waarnemings en gevolgtrekkings goed.
70-100% 4 Skep geleentheid vir ander se bydraes. Maak altyd ‘n positiewe bydrae tot die groeptaak. Agting vir ander en begrip vir ander standpunte. Dit beïnvloed interpersoonlike verhoudings positief (positief aktief). Waarnemings en gevolgtrekkings uitstekend.

Assessering

Leeruitkomste 1: 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.

Assesseringstandaard 1.2: Dit is duidelik wanneer die leerder ondersoeke uitvoer en data versamel: organiseer en gebruik apparaat/toerusting of bronne om inligting in te win en te noteer;

Assesseringstandaard 1.3: Dit is duidelik wanneer die leerder data evalueer en bevindings kommunikeer: veralgemeen in terme van relevante aspekte en beskryf hoe die data die veralgemening onderskryf.

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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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