<< Chapter < Page Chapter >> Page >

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

who was the first nanotechnologist
Lizzy Reply
k
Veysel
technologist's thinker father is Richard Feynman but the literature first user scientist Nario Tagunichi.
Veysel
Norio Taniguchi
puvananathan
Interesting
Andr
I need help
Richard
anyone have book of Abdel Salam Hamdy Makhlouf book in pdf Fundamentals of Nanoparticles: Classifications, Synthesis
Naeem Reply
what happen with The nano material on The deep space.?
pedro Reply
It could change the whole space science.
puvananathan
the characteristics of nano materials can be studied by solving which equation?
sibaram Reply
plz answer fast
sibaram
synthesis of nano materials by chemical reaction taking place in aqueous solvents under high temperature and pressure is call?
sibaram
hydrothermal synthesis
ISHFAQ
how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
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
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
STM - Scanning Tunneling Microscope.
puvananathan
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 4' conversation and receive update notifications?

Ask