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Natuurwetenskappe

Materie, meting en reaksies

Materie en meting

Opvoeder afdeling

Memorandum

1.

  • km
  • m 3
  • mm
  • g en mg
  • kl of m 3
  • m 2
  • m en cm
  • ton
  • kl of cm 3
  • ligjare (die afstand wat lig in een jaar kan aflê)
  • Voorbeelde om belangrikheid van meting te kan verduidelik: enige drie goeie voorbeelde, bv.
  • die hoeveelheid medisyne wat iemand moet drink;
  • hoeveelheid sement en sand wat vir bouwerk gemeng moet word;
  • om prestasie by atletiek te kan meet (hoogspring, verspring, naellope, ens.).

Leerder afdeling

Inhoud

Aktiwiteit: om meeteenhede te kan gebruik en om te kan verduidelik hoekom dit belangrik is om te kan meet [lu 2.4]

Voordat ek kan bepaal wat my onkoste aan brandstof vir 'n voorgenome reis gaan wees, is dit nodig om die afstand wat ek gaan reis te bepaal. Indien ek my kombuis se vloer wil teël, moet ek eers die grootte (oppervlakte) van die vloer bereken. As ons wil bepaal hoeveel melk 'n baba met 'n sekere ouderdom en massa moet kry, moet ons die volume (inhoud) van die melk kan meet, ensovoorts. In die meeste wêrelddele maak ons gebruik van die metrieke stelsel. (die Système Internationale d'Unite's, of SI). Die vernaamste eenhede waarmee ons volgens die SI-meetstelsel meet, word deur die volgende tabel weergegee:

GROOT MIDDELMATIG KLEIN
Lengte 1 km = 1 000 m1 m = 1 000 mm kilometer (km) meter (m)sentimeter (cm) millimeter (mm)
Oppervlakte 1 cm² = 100 mm²1 m² = 10 000 cm² vierkante meter (m²) vierkante sentimeter (cm²) vierkante millimeter (mm²)
Inhoud 1 kl = 1 000 ℓ1 l = 1 000 ml kiloliter (kℓ)kubieke meter (m 3 ) liter (ℓ) kubieke sentimeter (cm 3 )milliliter (mℓ)
Massa 1 kg = 1 000 g1 g = 1 000 mg kilogram (kg) gram (g) milligram (mg)

1. Watter eenhede sal jy gebruik om die volgende te meet?

  • Die afstand wat 'n pendeltuig om die aarde aflê.________________________
  • Die hoeveelheid beton wat die fondament van 'n huis vereis ______________
  • Die omtrek van my rollemskaatse se wieletjies._________________________
  • Die massa van 'n sprinkaan.________________________________________
  • Die kapasiteit van 'n swembad.______________________________________
  • Die grootte (oppervlakte) van 'n tennisbaan.____________________________
  • Die lengte van ons onderwyser._____________________________________
  • Die massa van 'n vragmotor.________________________________________
  • Die kapasiteit van 'n warmwatersilinder.______________________________
  • Die afstand tussen die aarde en die naaste ster._________________________

2. Noem nog drie goeie voorbeelde om te verduidelik hoekom dit belangrik is om te kan meet.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Assessering

Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.4: Dit is duidelik wanneer die leerder kennis toepas: pas konseptuele kennis toe deur ‘n begrip wat onderrig is met ‘n variasie van ‘n soortgelyke situasie in verband te bring.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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
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
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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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