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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 23

Voorsiening van skoon water

Aktiwiteit:

Om die voorsiening van skoon water aan huishoudings te beskryf

[lu 3.2]

Wanneer ons water wil hê, draai ons net ‘n kraan oop. Het jul al ooit gewonder waar daardie water vandaan kom?

Kom ons toer saam met Walter Waterdruppel op sy reis na ‘n kraan.

a. Walter in die rivier op pad na die ________________________________

b. Van die opgaardam gaan hy met

_________________________________

na ‘n munisipale dam by ‘n dorp of ‘n stad.

c. Walter verlaat die munisipale dam deur ‘n

dik ___________

d. en hierdie pyp vertak in________

e. Om Walter op sy reis te help, moet jy die _______ oopdraai.

(a) Verduidelik hoekom ‘n kraan wat toe is, steeds kan drup en sodoende water mors.

(b) Noem drie redes waarom ‘n gestremde persoon, of ouer en klein kindertjies dit moeilik mag vind om ‘n kraan oop te draai.

Opdrag:

Vind uit waarvandaan jou dorp of stad se water kom.

Waarom is opgaardamme waardevol? Gee twee redes.

Vind ook uit watter groot opgaardam in jou omgewing is.

  1. Watter groot opgaardam kry ons in die Oranjerivier?
  1. Watter soort damme voorsien water aan dorpe en stede?
  1. Watter groot dam voorsien Johannesburg van water?
  1. Waarin word water wat op huise se dakke val, opgevang?
  1. Watter dam is naby die Paarl?

Assessering

LU 3

WETENSKAP, DIE SAMELEWING EN DIE OMGEWING Leerders is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Dit is duidelik wanneer die leerder:

3.1   wetenskap en tegnologie in die konteks van geskiedenis en inheemse kennis verstaan;

3.2   die impak van wetenskap en tegnologie verstaan;

3.3       vooroordeel in wetenskap en tegnologie herken.

Memorandum

Verspreiding van water

Walter Waterdruppel se reis na ‘n kraan:

  1. Die reën kom uit die wolke op die aarde.
  2. Opgaardam
  3. Pypleiding
  4. pyp dunner pype
  5. kraan
  6. Daar is net twee plekke waar ‘n kraan kan lek: by die rubberwaster waar die water uitkom en by die grys pakstuk waar die watervloei beheer word.
  • Die kraan is nie reg toegedraai nie.
  • Die waster het dalk barsies in of dit is platgedruk.
  • Daar is dalk sandkorreltjies wat die rubber beskadig binne-in die kraanomhulsel.
  • Wanneer water by die boonste deel uitlek, moet die moertjie by die boonste draaistam net vaster gedraai word.

g) 1. hulle hande is dalk te klein of te swak

  1. krane in openbare plekke wat deur die publiek gebruik word, behoort lang handvatsels te hê wat maklik oopdraai
  2. die kraan is dalk onnodig styf toegedraai

Opdrag

Kom ons vind uit:

  • Waarom is opgaardamme waardevol?
  • Altyd water vir huishoudelike gebruik (bv. In winter as rivier leeg is)
  • Besproeiing
  • Gariepdam
  • Munisipale opgaardamme
  • Vaaldam
  • Tenks
  • Wemmershoekdam

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
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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
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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