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Natuurwetenskappe

Graad 4

Energie en verandering

Module 32

Die mens se gebruik van elektriese energie

Aktiwiteit:

Om te ondersoek hoe elektriese energie deur die mens gebruik word

[lu 1.2, 1.3, 2.2]

In ons land, Suid-Afrika

Ons kry ons elektrisiteit van kragsentrales wat elektrisiteit aan die hele land voorsien. Elke dorp of stad se energievoorsiening hang af van die grootte van die gebied, die getal huise, die getal fabrieke en die getal mense.

Knip prentjies uit ou tydskrifte om die gebruik van elektrisiteit in julle dorp of stad uit te beeld. Plak dit op ‘n vel papier.

Skryf ‘n kort sinnetjie oor energieverbruik in die volgende plekke. Beskryf hoe jou eie kultuurgroep deur die jare wat verby is veilige maniere gevind het om energie te gebruik.

Op plase:

In fabrieke:

In myngebiede:

In ons gemeenskap:

Maak jou eie lys van die plekke waar elektrisiteit in ons gemeenskap gebruik word.

Hieronder volg drie opdragte. Kies een en doen ‘n rolspel daaroor.

Daar is ‘n kragonderbreking in jou skool. hoe beïnvloed dit:

  1. jou?
  2. jou onderwyser?
  3. die opsigter?
  4. die sekretaresse?
  5. die skoolhoof?

Daar is sommige skole in ons land wat nie elektrisiteit het nie. Wat dink jy doen hulle om hulle skoolwerk te doen?

Daar is ‘n kragonderbreking in die hospitaal. hoe beïnvloed dit:

  1. die pasiënt?
  2. die dokter en verpleegpersoneel?
  3. die kombuis?
  4. die teater?

Daar is ‘n kragonderbreking in die supermark. hoe beïnvloed dit:

  1. die kliënt?
  2. die bestuurder?
  3. die kasregister?
  4. die bakkery-afdeling
  5. die vleisafdeling
  6. die yskaste?

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

Dis duidelik wanneer die leerder

  • ondersoeke uitvoer en data versamel;
  • data evalueer en bevindings kommunikeer.

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

Assesseringstandaard

Dis duidelik wanneer die leerder

2.2 inligting kategoriseer.

Memorandum

In ons land Suid-Afrika

Skryf ‘n kort sinnetjie oor energieverbruik in die volgende plekke: (Die kinders moet hulle eie sinne volgens hul kulturele groep skryf, hoe deur die jare wat verby is, hulle veilige maniere gevind het om energie te gebruik. Hierdie sinne is net riglyne.)

Op plase:

Boere gebruik elektrisiteit om tyd, energie en geld te bespaar, maar dan het hy dalk nie so baie werkers nodig nie.

In fabrieke:

Fabrieke kan nie sonder elektrisiteit werk nie. Die masjiene wat produkte maak, werk baie lang ure.

In myngebiede:

Masjiene wat in myne gebruik word, gebruik elektrisiteit. Dit bespaar tyd en maak die myners se taak makliker.

In ons gemeenskap

Lys die plekke waar elektrisiteit in ons gemeenskap gebruik word.

  • Huise
  • Supermarkte
  • Apteke
  • Hospitale
  • Strate
  • Inkopiesentrums
  • Kerke
  • Enige aanvaarbare antwoord

Kolom AKolom BMaak nat klere droogTuimeldroërKyk stories en natuurprogrammeTelevisieNeem boodskappe wanneer iemand nie tuis is nieTelefoonantwoordmasjienHou die lug koel in ‘n vertrekLugversorgerKook kos daaropStoofWas vuil klereWasmasjienMaak ons klere weer netjiesStrykysterLuister na musiekHoëtroustel

Questions & Answers

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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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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