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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

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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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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