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Natuurwetenskappe

Graad 4

Energie en verandering

Module 26

Die son as bron van energie op aarde

Aktiwiteit:

Om die son as bron van energie vir lewe op aarde te beskryf

[LU 2.1]

Die son is natuurlik ons belangrikste bron van energie. Die mens aanvaar die son as vanselfsprekend, want ons sien elke oggend die son opkom en saans sien ons dit weer ondergaan. Die son stuur sy energie in alle rigtings oor die aarde. Die son verhit die aarde en gee dus op hierdie manier energie aan die aarde. Die plante gebruik van hierdie energie om te groei en wanneer diere die plante eet, kry hulle ook van hierdie energie! Die diere gebruik weer die energie om te beweeg en te groei.

Waar kry ons as mense ons energie vandaan?

Verduidelik in ‘n kort sinnetjie wat op elk van die volgende prentjies gebeur. Skryf die sin netjies onder elke prentjie neer.

Energie is dus nou vanaf die son na die koringplant en vandaar na Phillip se liggaam oorgedra. Hierdie oordrag is soos wanneer jy pouse ‘n broodjie met jou maatjie sal deel. Jy gee dit mos weg vir hom/haar.

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

Sinne wat by die prentjies pas

Die son gee energie aan die koringplant, wat dan die energie stoor.

Die brood en pap bevat nou die energie van die koring.

Phillip se liggaam neem nou die energie op.

Hy gebruik energie om te oefen.

Om kos gaar te maak deur sonenergie te gebruik

  • Neem ‘n polisterienkoppie en voer dit met plastiek uit en sit kos daarin.
  • Bind die bokant van die koppie toe met ‘n stuk plastiek en bind dit stewig met ‘n rek toe.
  • Neem ‘n A4-stuk papier of karton en sit aluminiumfoelie op die een kant, maak ‘n keëlvorm daarmee en sit dit rondom die koppie met die foelie aan die binnekant. Sny dit netjies.
  • Sit die koppie met die keël in ‘n ander polisterienkoppie en sit dit in ‘n houer om regop te bly; sit sommer koerantpapier rondom om dit te stut.
  • Sit dit nou in die son, en maak seker dat die “oondjie” na die son toe wys”.
  • Los dit so totdat die kos gaar is. Beweeg die pot, sodat dit altyd na die son toe wys.

Questions & Answers

differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
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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
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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