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Opdrag:

Doen naleeswerk en beskryf nog vyf maniere waarop plante waterverlies voorkom en vyf wyses waarop diere waterverlies voorkom.

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 bewys as die leerder:

1.1 ondersoeke kan beplan;

1.2 ondersoeke kan uitvoer en data kan insamel;

1.3 data kan evalueer en bevindinge kan kommunikeer.

LU 2

Wetenskaplike Kennis

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

Dit is bewys as die leerder:

2.1 sinvolle inligting kan onthou;

2.2 inligting in kategorieë kan plaas;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

LU 3

Wetenskap, die Gemeenskap en die Omgewing

Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Dit is bewys as die leerder:

3.1 wetenskap as ‘n menslike aktiwiteit kan verstaan;

3.2 volhoubare gebruik van die aarde se hulpbronne verstaan.

Memorandum

Aktiwiteit 1:

Waarde van water en die watersiklus

Eie voorstelling van watersiklus:

Maak seker dat die leerder al die terme in die tabel in sy skets gebruik het.

El Nino, droogtes en vloede

1. Help die klas om uit almal se terugvoer/voordragte die beste inligting te selekteer en neer te skryf

2. Soos by 1.

Waterbesparing by die huis

  • Hoe kan jou gesin bydra tot waterbesparing?
  • Maak ’n lys van die beste voorstelle:
  • Laat klas saam besluit oor die beste voostelle. Prys die leerder wie se lys die nouste met die klas se lys ooreenstem.

Aktiwiteit 3:

Aanpassings van plante en diere by toestande van watertekort

Drie groepe met voorbeelde : mesofiete (enige voorbeeld), xerofiete (bv. die aalwyn, ander vetplante, turksvy ens.), hidrofiete (waterlelie, ens.)

Ontwerp : Let op vlesige blare, dikwels klein, dat hulle sittend is en so gerangskik dat hulle water na die stam toe gelei. Blare kan ook baie klein en doringagtig wees. Kan ’n waslagie hê. Vlak wortels, baie vertak.

Opdrag:

  • Voorbeelde (aanvaar enige ander wat sin maak):
  • Plante
  • Harige blare
  • Min openinge (huidmondjies)
  • Openinge slegs aan onderkant van blaar
  • Vlesige stam en wortels
  • Groot ondergrondse dele waarin water gestoor kan word
  • Diere
  • Klein liggaamsoppervlak
  • Min of geen urienuitskeiding
  • Droë ontlasting
  • Min bloedvate naby vel in groot gedeelte van die liggaam (omdat die liggaam as gevolg daarvan nie baie kan afkoel nie, word ander meganismes ontwikkel om bepaalde dele soos die brein koel te hou; bv. die gemsbok sirkuleer bloed wat na die brein toe gaan deur die neusvleuels, sodat dit kan afkoel)
  • Eet kos met hoë voginhoud

Maak die leerders vertroud met die volgende begrippe:

Hyging: vinnige asemhaling met groot vogverlies vanaf slymvliese van die keel en mond – soos by honde en voëlsoorte

Estivering: somerslaap

Enkele sentimeters onder die grond is dit koeler – daarom tonnels

Migrasie: veral voëls en sekere boksoorte trek na beter voedselbronne self seisoenaal soos swaeltjies

Rete mirabilis: wondernetwerk bloedvate in gemsbok se neusvleuels vir afkoeling

Diere se oorlewingstrategieë

  • Gemsbok: koelteboom, en hou brein koel deur bloed in neus
  • Meerkatte: gaan onder grond
  • Kan beweeg na waar daar water is, vel sweet nie – verloor nie water nie maar kan afkoel deur te vlieg
  • Sweet slegs deur tong

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
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
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
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Source:  OpenStax, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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