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Natuurwetenskappe

Graad 4

Die planeet aarde en die heelal

Module 43

Weerpraatjies

Aktiwiteit:

Om oor die weer te praat

[lu 1.3, 2.1]

Die een ding op aarde wat elke dag die meeste verander, is sekerlik die weer. Die weer beïnvloed waar ons wil woon, die klere wat ons dra en die aktiwiteite wat ons beplan.

Die mens is nou maar eenmaal so: ons wil altyd weet wat die weer gaan doen. Daarom hou ons die weervoorspellings op televisie en in die koerante dop en luister gereeld na die radio.

Noem gou ‘n paar redes in jou groep op waarom dit nodig mag wees om vooruit te weet wat die weer inhou.

Wat is weer nou eintlik?

Hitte en sonlig beweeg deur die aarde se atmosfeer. Die sonstrale beïnvloed die lug op vier maniere, nl. die temperatuur, humiditeit, lugdruk en die wind.

Skryf ‘n sinnetjie oor elk van bogenoemde. Kyk na die beskrywende prentjies:

Temperatuur

Humiditeit

Lugdruk

Wind

Probeer die volgende

Maak ‘n vlaggie en hang dit buite in ‘n oopte om te kyk hoe sterk die wind daardie dag waai.

Hang lepeltjies aan vislyn aan ‘n draadhanger buite op. Luister hoe 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

Dis duidelik wanneer die leerder

  • data evalueer en bevindinge kommunikeer.

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

Assesseringstandaard

Dis duidelik wanneer die leerder

  • betekenisvolle inligting onthou.

Memorandum

  • Noem gou ‘n paar redes in jou groep op waarom dit nodig mag wees om vooruit te weet wat die weer inhou.

Moontlike redes

  • As jy uitgaan, wil jy weet of jy ‘n jas of dalk ‘n reënbaadjie moet saamneem, veral na sportwedstryde of buitelugoptredes.
  • Boere beplan hulle take volgens die weer.
  • Indien daar dalk gevaar (bv. orkaan of ‘n tornado) is, moet veiligheidsmaatreëls reeds is plek wees.
  • Ons wil sien of ons ons wasgoed maar buite kan hang!

Temperatuur: Die son verwarm die aarde. Die hitte reflekteer vanaf die wolke en vanaf die aarde om die temperatuur van die lug te bepaal.

Humiditeit: Waterdamp styg op vanaf die aarde en die see om wolke te vorm. Wanneer daar baie waterdruppels bymekaar is, val die reën na die aarde. Humiditeit is die voggehalte van die lug.

Lugdruk: Lugdruk word bepaal deur die lug wat in verskillende rigtings gedruk word.

Wind: Wind is lug wat vinnig beweeg.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
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
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
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
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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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