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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 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 to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
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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