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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 1

Die sintuie

Alle lewende organismes bestaan uit selletjies. Jou liggaam is net soos ‘n masjien met baie onderdele wat elkeen sy eie taak het om te verrig. Die heel kleinste lewende deeltjies in ons liggaam word selle genoem. Daar is miljoene van hulle wat dag en nag werk om ons aan die lewe te hou.

Die selle doen nie almal presies dieselfde werk nie en daarom lyk hulle verskillend. Hulle vorm bene, spiere, organe, are, senuwees en natuurlik jou vel wat alles bymekaar hou!

Kom ons bekyk sommige dele van die liggaam ‘n bietjie van nader.

DIE SINTUIE

Ons noem die vyf sintuie sig, gehoor, reuk, smaak en tas. Die mens se sig is beter ontwikkel as sommige diere s’n, terwyl sommige diere, soos die kat en die hond, se gehoorsintuig weer beter ontwikkel is as die mens s’n. Hoekom dink jy is dit so?

Aktiwiteit:

Om oor die sintuie te gesels

[lu 2.1]

Opdrag 1

Soek prentjies in ou tydskrifte van mense en diere se sintuie, vergelyk dit en plak dit op 'n vel papier.

Opdrag 2

Skryf die bypassende sintuig onder elke prentjie:

Assessering

LU 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.

Dit is duidelik wanneer die leerder:

1.1   ondersoek beplan;

1.2   ondersoek uitvoer en data versamel;

1.3       data evalueer en bevindings kommunikeer.

 

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.

 

LU 3

WETENSKAP, DIE SAMELEWING EN DIE OMGEWING Leerders is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Dit is duidelik wanneer die leerder:

3.1   wetenskap en tegnologie in die konteks van geskiedenis en inheemse kennis verstaan;

3.2   die impak van wetenskap en tegnologie verstaan;

3.3       vooroordeel in wetenskap en tegnologie herken.

Memorandum

DIE SINTUIE

Hoekom dink jy is dit so? Aanpassing by leefwyse, bv. Voeding en gevare.

Opdrag 2:

Sig: seuntjie wat boek lees

Gehoor: musieknote

Reuk: blom

Smaak: vis en skyfies

Tas: bad (vel voel water)

Questions & Answers

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
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 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
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
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
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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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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