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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 5

Die reuk- en smaaksintuie

Aktiwiteit:

Om te leer oor die reuk- en smaaksintuie

[lu 2.1]

Wanneer jy eet, proe jou tong die smaak en jou neus ruik die geur van die kos. Dit werk so:

Die openinge van jou neus en jou mond kom bymekaar agter in jou keel. Wanneer jy eet, gaan die kosreuke agter in jou mond na jou neus, vanwaar ‘n boodskap deur ‘n senuwee na jou brein gestuur word wat vir jou sê wat jy ruik.

Die tong is grof en bedek met smaakknoppies om verskillende smake vas te stel. Skryf die vier verskillende smake wat ‘n mens op jou tong kan waarneem, neer.

Druk jou neus toe en drink ‘n slukkie koeldrank of tee. Hoekom “proe” dit anders?

Wat gebeur as jy verkoue is en jy eet?

Diere se reuksintuig

  • Die muishond beskerm homself deur ‘n stink vloeistof wat hy na sy vyand toe sprei.
  • Honde kan baie goed ruik. Hulle gebruik hulle reuksin om dwelms, plofstowwe en selfs mense in ‘n groot skare uit te ruik. Hy gebruik ook sy reuksin om sy prooi te jag.
  • Bokke gebruik reuk om buite gevaar te bly. As hulle hul vyand ruik, beweeg hulle gou-gou weg.
  • ‘n Renoster gebruik ook sy reukkliere onder sy voete om boodskappe aan ander renosters te stuur.
  • Voëls hou hulle neste gewoonlik skoon, maar nie die hoep-hoep nie. Deel van sy verdedigingstelsel is dat die stink reuk van sy nes vyande sal weghou.

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

  1. Soet
  2. Sout
  3. Bitter
  4. Suur

Druk neus toe: Geure kan nie in die neus inbeweeg nie, dus proe jy net soet, sout, bitter en suur.

Verkoue: Dieselfde as hierbo.

Opdrag 6:

Diere se reuksintuig

  • Die muishond beskerm homself deur ‘n stink vloeistof wat hy na sy vyand toe sprei.
  • Honde kan baie goed ruik. Hulle gebruik hulle reuksin om dwelms, plofstowwe en selfs mense in ‘n groot skare uit te ruik. Hy gebruik ook sy reuksin om sy prooi te jag.
  • Bokke gebruik reuk om buite gevaar te bly. As hulle hul vyand ruik, beweeg hulle gou-gou weg.
  • ‘n Renoster gebruik ook sy reukkliere onder sy voete om boodskappe aan ander renosters te stuur.
  • Voëls hou hulle neste gewoonlik skoon, maar nie die hoep-hoep nie. Deel van sy verdedigingstelsel is dat die stink reuk van sy nes vyande sal weghou.

Questions & Answers

how does the planets on our solar system orbit
cheten Reply
how many Messier objects are there in space
satish Reply
did you g8ve certificate
Richard Reply
what are astronomy
Issan Reply
Astronomy (from Ancient Greek ἀστρονομία (astronomía) 'science that studies the laws of the stars') is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution.
Rafael
vjuvu
Elgoog
what is big bang theory?
Rosemary
what type of activity astronomer do?
Rosemary
No
Richard
the big bang theory is a theory which states that all matter was compressed together in one place the matter got so unstable it exploded releasing All its contents in the form of hydrogen
Roaul
I want to be an astronomer. That's my dream
Astrit
Who named the the whole galaxy?
Shola Reply
solar Univers
GPOWER
what is space
Richard
what is the dark matter
Richard
what are the factors upon which the atmosphere is stratified
Nicholas Reply
is the big bang the sun
Folakemi Reply
no
Sokak
bigbang is the beginning of the universe
Sokak
but thats just a theory
Sokak
nothing will happen, don't worry brother.
Vansh
what does comet means
GANGAIN Reply
these are Rocky substances between mars and jupiter
GANGAIN
Comets are cosmic snowballs of frozen gases , rock and dust that orbit the sun. They are mostly found between the orbits of Venus and Mercury.
Aarya
hllo
John
hi
John
qt rrt
John
r u there
John
hey can anyone guide me abt international astronomy olympiad
sahil
how can we learn right and true ?
Govinda Reply
why the moon is always appear in an elliptical shape
Gatjuol Reply
Because when astroid hit the Earth then a piece of elliptical shape of the earth was separated which is now called moon.
Hemen
what's see level?
lidiya Reply
Did you mean eye sight or sea level
Minal
oh sorry it's sea level
lidiya
according to the theory of astronomers why the moon is always appear in an elliptical orbit?
Gatjuol
hi !!! I am new in astronomy.... I have so many questions in mind .... all of scientists of the word they just give opinion only. but they never think true or false ... i respect all of them... I believes whole universe depending on true ...থিউরি
Govinda
hello
Jackson
hi
Elyana
we're all stars and galaxies a part of sun. how can science prove thx with respect old ancient times picture or books..or anything with respect to present time .but we r a part of that universe
w astronomy and cosmology!
Michele
another theory of universe except big ban
Albash Reply
how was universe born
Asmit Reply
there many theory to born universe but what is the reality of big bang theory to born universe
Asmit
what is the exact value of π?
Nagalakshmi
by big bang
universal
there are many theories regarding this it's on you believe any theory that you think is true ex. eternal inflation theory, oscillation model theory, multiple universe theory the big bang theory etc.
Aarya
I think after Big Bang!
Michele
from where on earth could u observe all the stars during the during the course of an year
Karuna Reply
I think it couldn't possible on earth
Nagalakshmi
in this time i don't Know
Michele
is that so. the question was in the end of this chapter
Karuna
in theory, you could see them all from the equator (though over the course of a year, not at pne time). stars are measured in "declination", which is how far N or S of the equator (90* to -90*). Polaris is the North star, and is ALMOST 90* (+89*). So it would just barely creep over the horizon.
Christopher
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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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