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Natuurwetenskappe

Graad 4

Energie en verandering

Module 25

Die betekenis van die woord ‘energie’

Energie en Verandering

Wat beteken die woord energie? As ons dit in die woordeboek naslaan, sien ons dit beteken: Energie is ‘n krag wat beweging of aksie veroorsaak, of enige vorm van werk kan verrig .

Aktiwiteit:

Om die betekenis van die woord “energie” te verstaan

[LU 2.1]

Die prent hieronder illustreer die wyse waarop ons vandag leef. Bespreek die prent en identifiseer al die gebruike van energie.

E

N

E

R

G

I

E

Energie is die spesiale krag in jou liggaam wat jy nodig het om werk te kan doen. Hoe harder jy werk, hoe meer energie gebruik jy en hoe meer het jy nodig. Soms voel jy nie eens lus om uit die bed uit op te staan nie; ander kere voel jy dalk lus om ‘n heuwel uit te klim!

Enigiets wat werk doen, gebruik energie — selfs voertuie. Die mens het beslis energie nodig om aan die lewe te bly.

Daar is baie bronne in die natuur wat gebruik kan word om werk vir ons te doen, maar ons moet verstaan dat hierdie bronne nie vir altyd by ons sal wees nie en daarom moet dit spaarsamig gebruik word. Alle mense in ons land het ook nie toegang tot al die bronne van energie nie. Dié van ons wat wel sulke toegang het, moet dit as ‘n voorreg beskou en dit nie misbruik nie.

Assessering

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.

Memorandum

  • Hou ‘n lekker klasbespreking oor die prent. Laat die kinders dit eers in groepe bespreek. Laat hulle nou terugvoering gee. Gesels nou oor die algemeen oor energie. Verwys terug na die prent terwyl die module gedoen word.
  • Gesels eers oor die algemeen oor energie, voordat die takie gedoen word.
  • Enige aanvaarbare antwoord is reg.

Energie is lewe.

Niks kan bestaan sonder energie nie.

Ek het energie nodig om te werk.

Reg vir die dag!

Genoeg krag vir die dag.

Iets wat ek doen.

Ek het energie nodig om sport te beoefen.

Questions & Answers

What is inflation
Bright Reply
a general and ongoing rise in the level of prices in an economy
AI-Robot
What are the factors that affect demand for a commodity
Florence Reply
price
Kenu
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
hi guys good evening to all
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
yes,thank you
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
ok
Shukri
how do you save a country economic situation when it's falling apart
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
thank you so much 👍 sir
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
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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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