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NATUURWETENSKAPPE

Materie en stowwe

Eienskappe en gebruike van materie

Opvoeders afdeling

Memorandum

Opdrag 2: (groepwerk)

MAGNETIESESTOWWE NIE-MAGNETIESESTOWWE
skuifspeld vuurhoutjie
speld knoop
R2-stuk
spyker
drukspyker
lemmetjie
  • (Daar kan nog baie ander voorbeelde ook wees – leerders kan die lys aanvul).

ASSESSERING

  • Lys die stowwe waaruit die volgende voorwerpe hoofsaaklik bestaan en dui aan of dit magneties (M) of nie-magneties (NM) is:
VOORWERP STOF WAARUIT DITBESTAAN MAGNETIES /NIE-MAGNETIES
R2-stuk nikkel magneties
skuifspeld yster/staal magneties
vuurhoutjie hout nie-magneties
brood graan nie-magneties
motor staal magneties
skeermeslemmetjie vlekvrye staal/yster magneties
potlood hout nie-magneties
R50-noot papier nie-magneties
kosblik plastiek nie-magneties
skoolhemp katoen nie-magneties
trui wol nie-magneties
mieliepap graan nie-magneties
mes vlekvrye staal magneties
skoen leer nie-magneties
sakdoek katoen nie-magneties
SLEUTEL: SELFASSESSERING
Alles korrek 4
Slegs twee verkeerd 3
Vyf verkeerd 2
Minder as vyf korrek 1

Opdrag 3:

WAARNEMINGS
Proefbuis 1 Die spyker begin roes.
Proefbuis 2 Die spyker roes nie, want die suurstof kan nie in die water ingaan nie omdat die olie die proefbuis seël.
Proefbuis 3 Die spyker roes vinniger, want daar is sout in die water.
Proefbuis 4 Die spyker kan nie roes nie, want daar is geen water in die proefbuis nie.
Proefbuis 5 Die kalsiumchloried maak die lug droog, m.a.w. daar is nie vog in die lug nie. Die spyker roes nie.
Proefbuis 6 Die spyker kan nie roes nie, want dit is met ‘n lagie olie bedek.
Proefbuis 7 Die spyker word met ‘n lagie sink bedek. Dit beskerm ‘n deel van die spyker – daardie deel sal nie roes nie. Die deel van die spyker wat nie bedek is nie, sal roes in die water.

Gevolgtrekking:

  • Water en suurstof is noodsaaklik vir yster om te roes. Sout bespoedig die proses.

ASSESSERING

  • (Summatief)

Gebruik nou die kennis wat jy opgedoen het en maak die volgende afleidings:

1. Hoekom is daar ‘n lagie olie bo-op die water in proefbuis 2?

Om die suurstof uit die water te hou sodat die spyker nie roes nie.

2. Die spykers in proefbuise 1 en 3 roes wel. Hoekom?

Daar is in proefbuise 1 en 3 suurstof en sout in die water opgelos.

3. Hoekom het proefbuis 5 ‘n rubberprop op?

Om die suurstof uit die proefbuis te hou sodat die spyker nie kan roes nie.

4. Watter vorm van roesbeskerming word voorgestel deur proefbuis 7?

Die spyker word met sink bedek.

Opdrag 4:

  • (Individueel)
Voorwerp 1 Voorwerp 2 Voorwerp 3
Voorwerp wat geroes het Hark
Plek waar voorwerp voorgekom het (binne/buite) Buite
Voorkoms van voorwerp (nat/droog) Nat
Is daar dele van die voorwerp wat meer geroes het as ander dele? Die handvatsel wat van plastiek gemaak is, roes nie.Die res van die hark roes, want dit is van yster gemaak.
Waarom het roes voorgekom? Dit het buite in die reën gestaan.Water laat yster roes.
  • (Daar kan nog baie ander voorbeelde wees.) Opdrag 5:
  • (Individueel)

1. Watter faktore sal jy in aanmerking neem wanneer jy ‘n nuwe stelsel moet aanbring?

  • Hoe lank gaan ek nog met die motor ry voordat ek dit verkoop?
  • Hoe oud is die motor?
  • Hoeveel geld het ek?
  • ens.

2. Watter uitlaatstelsel, dink jy, is goedkoper in die langtermyn?

Questions & Answers

What are the factors that affect demand for a commodity
Florence Reply
differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
how will I do?
Venny Reply
how is the graph works?I don't fully understand
Rezat Reply
information
Eliyee
devaluation
Eliyee
t
WARKISA
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Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
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Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
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Shukri
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Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
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Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
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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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