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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

what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
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
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
Got questions? Join the online conversation and get instant answers!
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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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