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Natuurwetenskappe

Graad 4

Energie en verandering

Module 32

Die mens se gebruik van elektriese energie

Aktiwiteit:

Om te ondersoek hoe elektriese energie deur die mens gebruik word

[lu 1.2, 1.3, 2.2]

In ons land, Suid-Afrika

Ons kry ons elektrisiteit van kragsentrales wat elektrisiteit aan die hele land voorsien. Elke dorp of stad se energievoorsiening hang af van die grootte van die gebied, die getal huise, die getal fabrieke en die getal mense.

Knip prentjies uit ou tydskrifte om die gebruik van elektrisiteit in julle dorp of stad uit te beeld. Plak dit op ‘n vel papier.

Skryf ‘n kort sinnetjie oor energieverbruik in die volgende plekke. Beskryf hoe jou eie kultuurgroep deur die jare wat verby is veilige maniere gevind het om energie te gebruik.

Op plase:

In fabrieke:

In myngebiede:

In ons gemeenskap:

Maak jou eie lys van die plekke waar elektrisiteit in ons gemeenskap gebruik word.

Hieronder volg drie opdragte. Kies een en doen ‘n rolspel daaroor.

Daar is ‘n kragonderbreking in jou skool. hoe beïnvloed dit:

  1. jou?
  2. jou onderwyser?
  3. die opsigter?
  4. die sekretaresse?
  5. die skoolhoof?

Daar is sommige skole in ons land wat nie elektrisiteit het nie. Wat dink jy doen hulle om hulle skoolwerk te doen?

Daar is ‘n kragonderbreking in die hospitaal. hoe beïnvloed dit:

  1. die pasiënt?
  2. die dokter en verpleegpersoneel?
  3. die kombuis?
  4. die teater?

Daar is ‘n kragonderbreking in die supermark. hoe beïnvloed dit:

  1. die kliënt?
  2. die bestuurder?
  3. die kasregister?
  4. die bakkery-afdeling
  5. die vleisafdeling
  6. die yskaste?

Assessering

LEERUITKOMS 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.

Assesseringstandaard

Dis duidelik wanneer die leerder

  • ondersoeke uitvoer en data versamel;
  • data evalueer en bevindings kommunikeer.

LEERUITKOMS 2: KONSTRUKSIE VAN WETENSKAPLIKE KENNIS Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard

Dis duidelik wanneer die leerder

2.2 inligting kategoriseer.

Memorandum

In ons land Suid-Afrika

Skryf ‘n kort sinnetjie oor energieverbruik in die volgende plekke: (Die kinders moet hulle eie sinne volgens hul kulturele groep skryf, hoe deur die jare wat verby is, hulle veilige maniere gevind het om energie te gebruik. Hierdie sinne is net riglyne.)

Op plase:

Boere gebruik elektrisiteit om tyd, energie en geld te bespaar, maar dan het hy dalk nie so baie werkers nodig nie.

In fabrieke:

Fabrieke kan nie sonder elektrisiteit werk nie. Die masjiene wat produkte maak, werk baie lang ure.

In myngebiede:

Masjiene wat in myne gebruik word, gebruik elektrisiteit. Dit bespaar tyd en maak die myners se taak makliker.

In ons gemeenskap

Lys die plekke waar elektrisiteit in ons gemeenskap gebruik word.

  • Huise
  • Supermarkte
  • Apteke
  • Hospitale
  • Strate
  • Inkopiesentrums
  • Kerke
  • Enige aanvaarbare antwoord

Kolom AKolom BMaak nat klere droogTuimeldroërKyk stories en natuurprogrammeTelevisieNeem boodskappe wanneer iemand nie tuis is nieTelefoonantwoordmasjienHou die lug koel in ‘n vertrekLugversorgerKook kos daaropStoofWas vuil klereWasmasjienMaak ons klere weer netjiesStrykysterLuister na musiekHoëtroustel

Questions & Answers

differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
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Lambiv
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Venny Reply
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Rezat Reply
information
Eliyee
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Eliyee
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WARKISA
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Lambiv
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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
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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
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Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
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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
types of unemployment
Yomi Reply
What is the difference between perfect competition and monopolistic competition?
Mohammed
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Source:  OpenStax, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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