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Natuurwetenskappe

Graad 4

Energie en verandering

Module 28

Energie vir mense se gebruik

Aktiwiteit:

Om wind as energiebron tot ons voordeel te gebruik

[LU 1.1, 1.2, 1.3, 2.1]

Ken jy die volgende idiome en spreekwoorde oor wind?

Na wind kom reën (na vrolikheid kom olikheid

Vir wind en weer rondloop (die ouers gee nie om hoe die kinders grootword nie)

Dit gaan voor die wind (dit gaan goed)

Dis pure wind (dis net grootpratery)

Hy is deur die wind (hy is deurmekaar)

Die wind van voor kry (teëspoed kry)

Goeie raad in die wind slaan (steur hom nie aan goeie raad nie)

Wat is wind?

Blaas op jou hand. Wat voel jy op jou hand?

Ons kan nie wind sien nie, maar ons kan dit voel as dit teen ons gesigte waai of ons hare deurmekaar waai.

Ons wasgoed word sommer gou droog as die wind waai.

Weet jy hoekom?

Hoe ontstaan wind?

Voltooi die sinne met die ontbrekende woorde (bladsy 13) om die illustrasie te verduidelik.

  1. In die dag die son. Dit maak die land

.

  1. Warm lug .
  2. Koeler lug beweeg van die na die

om die warm lug se plek in te neem.

  1. So ontstaan .

Maak voorstelle aan jou maats en gee terugvoering aan die klas oor metodes om jou windmeultjie nog vinniger te laat draai.

Vou ‘n vliegtuigie

  • Vou ‘n vel A4-papier in die lengte.
  • Vou die papier weer oop en vou die twee boonste hoeke binnetoe, sodat hulle by die middel bymekaarkom.
  • Vou weer hierdie twee hoeke middel toe, sodat ‘n pylpunt nou vorm.
  • Vou die boonste puntjie binnetoe tot waar die twee ander punte bymekaar kom.
  • Vou dit in die middel om dit ‘toe te maak’
  • Vou die onderste punte een vir een om om die vlerke te vorm.
  • Vou nou albei vlerke terug, parallel met die middelste vou.
  • Hou dit nou onder vas en kyk hoe ver dit kan vlieg as jy dit gooi!
  • Vind nou uit watter voumetode ‘n papiervliegtuigie die beste kan laat vlieg. Kom wys vir die klas en motiveer jou verklaring.

Die gebruike van wind tot die mens se voordeel

Die mens het nog altyd die krag van die wind gebruik om dinge gedoen te kry.

Die mens weet al baie lank hoe om die wind tot sy voordeel te gebruik. Matrose het geweet hoe om die krag van wind te gebruik om hul skepe voort te dryf.

Windmeulens is gebruik om koring te maal en water uit die grond te pomp.

Die wind draai die “wiel” (die Nederlanders noem dit “wieke”) van die meul om die masjinerie aan die binnekant te laat werk. Moderne windmeulens het turbines wat gebruik word om elektrisiteit mee op te wek.

Kom ons bou ‘n vlieër!

Noem en beskryf eers die materiale wat daarvoor gebruik kan word en probeer dan om as ‘n klas/groep een te bou.

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

Dit is duidelik wanneer die leerder

1.1 ondersoeke beplan;

1.2 ondersoeke uitvoer en data versamel;

1.3 data evalueer en bevindings kommunikeer.

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

Assesseringstandaard

Dit is duidelik wanneer die leerder

2.1 betekenisvolle inligting onthou.

LEERUITKOMS 2: KONSTRUKSIE VAN WETENSKAPLIKE KENNIS

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

Assesseringstandaard

Dit is duidelik wanneer die leerder

  • betekenisvolle inligting onthou.

Memorandum

Wat is wind?

  1. Ek voel lug op my hand.
  2. Die wind skud die waterdruppels uit die wasgoed. Die waterdamp van die wasgoed verdwyn in die lug.

Hoe ontstaan wind?

Voltooi die sinne met die ontbrekende woorde om die illustrasie te verduidelik:

1. skyn, warm

2. styg

3. see, land

4. wind

Vou ‘n vliegtuigie:

Hou ‘n klaskompetisie om te kyk wie s’n kan die verste vlieg, binne en buite!

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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