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Natuurwetenskappe

Graad 4

Energie en verandering

Module 29

Wind as bron van energie

Aktiwiteit 1:

Om oor wind as ‘n genotvolle bron van energie te gesels

[lu 3.2]

Om buite te wees op ‘n winderige dag, kan ‘n mens baie energiek laat voel. Daar is baie maniere om die wind te geniet.

  • Dink vinnig in julle groepe wat vir julle die lekkerste manier sal wees om die wind te geniet.
  • As julle terugvoering gee, werk uit watter groep se idee die goedkoopste sal wees en watter een s’n die duurste sal wees.
  • Watter groep se idee is die minste moeite en watter groep se idee is die meeste moeite?
  • Skryf byskrifte by die volgende prentjies.

Aktiwiteit 2:

Om ander gebruike van wind te identifiseer

[LU 1.3]

Plante gebruik ook die wind!

Wind versprei sade van plante en bome. Saadjies is baie lig en kan dus maklik versprei word.

Oulike feite: Sommige saadjies het vlerkies wat hulle maklik kan laat ‘vlieg’.

Sommige saadjies sweef soos valskermpies.

Voëls se vere help hulle om in die wind te sweef. As die wind matig is, help dit byvoorbeeld swaeltjies om duisende kilometers ver na warmer lande te migreer.

Party diere, soos hasies byvoorbeeld, ruik die lug terwyl hulle eet. Omdat die wind die reuk van hul vyande dra, word hulle sodoende teen die dreigende gevaar gewaarsku.

Die loodse van vliegtuie gebruik die windkous op die lughawe, sodat hulle kan sien van watter kant af hulle moet land en opstyg. Dit wys ook hoe sterk die wind waai.

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

Dit is duidelik wanneer die leerder

1.3 data evalueer en bevindings kommunikeer.

LEERUITKOMS 3: WETENSKAP, DIE SAMELEWING EN DIE OMGEWINGDie leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Assesseringstandaard

Dit is duidelik wanneer die leerder

3.2 die impak van wetenskap en tegnologie verstaan.

Memorandum

Om buite te wees op ‘n winderige dag, kan ‘n mens baie energiek laat voel. Daar is baie maniere om die wind te geniet.

Skryf byskrifte by die volgende prentjies.

Ons kan watersport beoefen.

Ons kan in ‘n sweeftuig vlieg!

Ons kan ‘n vlieër laat vlieg.

Kom ons kyk nou wanneer wind gevaarlik kan wees

1. Bome waai om, verwoes motors en huise, paaie word versper, kragdrade kan omwaai en huise sonder elektrisiteit laat.

2. Storms op see kan die land laat oorstroom en skepe laat vergaan.

3. Tornado’s is die sterkste wind en kan tot 300 km per uur waai en ontsettende skade aanrig.

4. Wind kan gronderosie veroorsaak. Dink aan maniere hoe dit voorkom kan word.

5. As die wind heeltyd in een regtig waai, kan bome so skeef groei. Hoe kan ons veilig in sulke wind bly?

6. As ‘n veldbrand uitbreek, kan wind dit aanhelp en groot plantasies kan vernietig word.

7. Breekwaters word langs die see gebou om te voorkom dat die water nie op die land spoel nie.

8. Sommige diertjies bly veilig in hulle ondergrondse tonnels.

9. Op gevaarlike plekke word brûe en bergpaaie tydelik toegemaak sodat motoriste nie daar kan kry nie.

10. Rye bome en heinings kan langs landerye geplant word om te voorkom dat oeste beskadig word.

Questions & Answers

How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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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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