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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 4

Die gehoorsintuig

Aktiwiteit:

Om meer te leer oor die gehoorsintuig

[lu 2.1]

Luister na ‘n bandjie wat jou onderwyser vir jou speel. Probeer om die verskillende klanke te onderskei. Jou gehoor laat jou wonderlike dinge hoor, soos die klank van musiek, selfs ‘n speld wat val, of ‘n kanonskoot wat afgevuur word. Dit kan jou ook waarsku as ‘n motor skielik agter jou sy toeter blaas.

Die twee flappies langs jou kop is slegs die buitenste dele van jou oor; die res is alles binne-in jou kop en word deur die harde skedel beskerm. Die oor vang die klank op wat deur die lug tot binne-in jou oor beweeg. Binne-in jou oor word die klanke na boodskappe omgesit wat deur die senuwees na die brein beweeg. Jou slim brein vertel dan vir jou waarna jy luister. Die brein sorteer ook al die klanke wat jy hoor, uit.

Opdrag:

Vind uit hoekom jy twee ore het.

Vind uit wat dowe mense alles doen om hulle lewe te verbeter. Kyk of jy hulle vingertaal kan praat deur die kode hieronder te gebruik.

Baie diere flap hulle ore om uit te werk van watter kant af die klank kom. Dan hoef hulle nie hulle koppe te draai nie, want dan sien hulle vyande hulle dalk.

Klankgolwe trek beter deur water as liggolwe, daarom maak dolfyne eerder staat op hulle gehoor as om in die diep, donker, water hulle vyande te probeer sien.

Assessering

LU 2

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

 

Dit is duidelik wanneer die leerder:

2.1   betekenisvolle inligting onthou;

2.2       inligting kategoriseer.

 

Memorandum

Speel enige bandjie vir die kinders wat u opgeneem het. Probeer om ‘n variasie van geluide op te neem. Daar is ook sulke bandjies in biblioteke beskikbaar.

 

.

Questions & Answers

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
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 did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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