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Natuurwetenskappe

Energie-oordrag en kragte

Opvoeders afdeling

Memorandum

Hoe meer die breinaald bestryk word met die magneet, hoe meer skuifspelde sal daardeur getrek word. Leerders kan die breinaald verhit, kap of laat val om die magnetisme te vernietig.

Leerder afdeling

Inhoud

Aktiwiteit: groepwerk: om te leer hoe om ‘n magneet te maak [lu 2.4]

Elke groep kry:

  • ‘n staafmagneet
  • ‘n staal breinaald
  • wondergom
  • 10 skuifspelde

1. Sit die breinaald met wondergom op die bank vas.

2. Bestryk die naald van ent tot ent net in een rigting met dieselfde ent van die magneet. (Merk die punt van die naald waar jul die magneet oplig tydens bestryking.)

3. Herhaal dit 10 maal en kyk hoeveel skuifspelde die breinaald kan optel.

___________________________

4. Herhaal dit nog 10 maal en kyk hoeveel skuifspelde julle dan kan optel.

___________________________

5. Watter soort pool kom aan die punt wat jul gemerk het voor? ________________

(Gebruik die magneet waarmee die breinaald bestryk is daarvoor en hou die wet van magneetpole en die feit dat die rooi helfte van die magneet die noordpool is, in gedagte wanneer julle die besluit neem).

6. Skryf twee dinge neer wat julle sou kon doen om die breinaald sy magnetisme te laat verloor.

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7. Voer die voorstelle in nr. 6 uit om vas te stel of dit wel gebeur. JA / NEE.

8. Gaan maak nou jou eie magneet by die huis, maar gebruik ‘n elektriese metode (‘n sel) om ‘n elektromagneet te maak. Jou opvoeder moet vir julle verduidelik. Maak seker dat jou “magneet” magnetiese stowwe kan aantrek wanneer jy dit klas toe bring. Die sukses van jou produk sal daaraan gemeet word.

7. Gebruike van magnete:

Magnetiese krag word daagliks aangewend om die lewe vir die mens makliker te maak.

Assessering

Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.4: Dit is duidelik wanneer die leerder kennis toepas: pas konseptuele kennis toe deur ‘n begrip wat onderrig is met ‘n variasie van ‘n soortgelyke situasie in verband te bring.

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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