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Natural sciences

Grade 4

Life and way of living

Module 23

Supplying clean water to households

Supplying clean water to households

When we need water, we simply open the tap. Have you ever wondered where the water in the tap comes from ?

Let’s take a trip with Walter Water Drop on his way to a tap.

Walter in the river on his way to the

From the storage dam, he travels along

to a municipal dam near a town or city.

  1. Walter leaves the municipal dam through

a wide

and this pipe branches into

  1. To help Walter on his way, you have to open the

  1. Explain why a tap that is closed might still drip and therefore waste water.
  1. Try to give three reasons why a disabled person, an older person or young children may find it difficult to turn a tap.

Let’s investigate:

Find out from where your town or city gets water.

Why are storage dams valuable? (give two reasons)

Also find out which large storage dam is in your vicinity.

  1. Which large storage dam is on the Orange River?
  1. What kind of dam provides water to towns and cities?
  1. Which large dam supplies water to Johannesburg?
  1. What is used to catch rain water that runs off roofs?
  1. Which dam is near Paarl?

Assessment

LEARNING OUTCOME 3: SCIENCE, SOCIETY AND THE ENVIRONMENTThe learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

ASSESSMENT STANDARDS: WE KNOW THIS WHEN THE LEARNER

3.2 understands the impact of Science and Technology.

Memorandum

Distribution Of Water

Walter: Water Drop’s trip to a tap

  • Rain falls to the earth from the clouds
  • Storage dam
  • a pipeline
  • pipe ... narrower pipes
  • tap
  • A pipe can only leak from two places: from the rubber washer where the water flows out of the tap and from the packing where the flow is controlled.
  • He tap has not been closed properly
  • The washer may be cracked or be flattened
  • Grains of sand that damage the washer may have got into the casing of the tap.
  • If water leaks from the top of the tap, the nut on the upper turning shaft should be tightened.

g) 1. Their hands may be too small or too weak

  1. Taps used by the public in public places should have long handles that are easy to turn.
  2. The tap might be closed unnecessarily tightly.

Let’s investigate!

  • Why are storage dams valuable? (two reasons)
  • Water is available for domestic use at all times, even when rivers might run dry.
  • We are able to water for irrigation.
  1. Gariep Dam
  2. Municipal storage dams
  3. Vaal Dam
  4. Storage tanks
  5. Wemmershoek Dam

Questions & Answers

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
what is antagonism?
mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
Daprince Reply
what is fallopian tube
Merolyn
what is bladder
Merolyn
what's bulbourethral gland
Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
Pelagie Reply
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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Source:  OpenStax, Natural sciences grade 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11096/1.1
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