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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

it is the relatively stable flow of income
Chidubem Reply
what is circular flow of income
Divine Reply
branches of macroeconomics
SHEDRACK Reply
what is Flexible exchang rate?
poudel Reply
is gdp a reliable measurement of wealth
Atega Reply
introduction to econometrics
Husseini Reply
Hi
mostafa
hi
LEMLEM
hello
Sammol
hi
Mahesh
bi
Ruqayat
hi
Ruqayat
Hi fellas
Nyawa
hey
Sammol
hi
God
hello
Jahara
Good morning
Jorge
hi
abubakar
hi
Nmesoma
hi
Mahesh
Hi
Tom
Why is unemployment rate never zero at full employment?
Priyanka Reply
bcoz of existence of frictional unemployment in our economy.
Umashankar
what is flexible exchang rate?
poudel
due to existence of the pple with disabilities
Abdulraufu
the demand of a good rises, causing the demand for another good to fall
Rushawn Reply
is it possible to leave every good at the same level
Joseph
I don't think so. because check it, if the demand for chicken increases, people will no longer consume fish like they used to causing a fall in the demand for fish
Anuolu
is not really possible to let the value of a goods to be same at the same time.....
Salome
Suppose the inflation rate is 6%, does it mean that all the goods you purchase will cost 6% more than previous year? Provide with reasoning.
Geetha Reply
Not necessarily. To measure the inflation rate economists normally use an averaged price index of a basket of certain goods. So if you purchase goods included in the basket, you will notice that you pay 6% more, otherwise not necessarily.
Waeth
discus major problems of macroeconomics
Alii Reply
what is the problem of macroeconomics
Yoal
Economic growth Stable prices and low unemployment
Ephraim
explain inflationcause and itis degre
Miresa Reply
what is inflation
Getu
increase in general price levels
WEETO
Good day How do I calculate this question: C= 100+5yd G= 2000 T= 2000 I(planned)=200. Suppose the actual output is 3000. What is the level of planned expenditures at this level of output?
Chisomo Reply
how to calculate actual output?
Chisomo
how to calculate the equilibrium income
Beshir
Criteria for determining money supply
Thapase Reply
who we can define macroeconomics in one line
Muhammad
Aggregate demand
Mohammed
C=k100 +9y and i=k50.calculate the equilibrium level of output
Mercy Reply
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Isiaka
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Geli
hy
Man
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Bahunda
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Amisha
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Geli
from Nepal
Amisha
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Amisha
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Sekou
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Amisha
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Amisha
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Amisha
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Amisha
money as unit of account means what?
Kalombe
A unit of account is something that can be used to value goods and services and make calculations
Jim
all of you please speak in English I can't understand you're language
Muhammad
I want to know how can we define macroeconomics in one line
Muhammad
it must be .9 or 0.9 no Mpc is greater than 1 Y=100+.9Y+50 Y-.9Y=150 0.1Y/0.1=150/0.1 Y=1500
Kalombe
Mercy is it clear?😋
Kalombe
hi can someone help me on this question If a negative shocks shifts the IS curve to the left, what type of policy do you suggest so as to stabilize the level of output? discuss your answer using appropriate graph.
Galge Reply
if interest rate is increased this will will reduce the level of income shifting the curve to the left ◀️
Kalombe
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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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