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Wiskunde

Graad 5

Meting en tyd

Module 41

Massa

Massa

Aktiwiteit 1:

Om probleme op te los wat die kies van standaardeenhede insluit [LU 4.6]

1. Net soos by lengte, is dit noodsaaklik dat ons sal weet wanneer om gram, kg en ton as eenheid te gebruik.

Werk saam met ’n maat en maak beurte. Neem enige drie voorwerpe in jou klas. Hou elkeen apart vas en rangskik hulle dan van die ligste tot die swaarste. In watter eenheid sal jy jou items weeg: gram? kg? ton?

Voltooi die tabel:

Item Van lig tot swaar Eenheid
1 . .......................................... .......................................... ..........................................
2 . .......................................... .......................................... ..........................................
3 . .......................................... .......................................... ..........................................

Onthou jy nog?

1 000 g = 1 kg

1 000 kg = 1 ton

Soms is items / artikels so lig dat jy nie kan sien hoeveel hulle weeg op ’n gewone skaal nie. Maak ’n regmerkie by dié wat jy dink ’n massa van minder as 1 gram het.

’n veer
’n krammetjie
’n haarrekkie
’n uitveër
’n lemoen
’n pen
’n koppiespeld
’n sandkorrel
’n haar

Aktiwiteit 2:

Om te meet en op te teken [LU 4.5.1]

Om met toepaslike meetinstrumente presies te meet [LU 4.7.1]

Het jy geweet?

Om die massa van ’n item te bepaal, beteken dat ons wil weet hoe swaar die item is of hoeveel dit weeg . Om dit te kan doen, benodig ons ’n skaal . Aan hoeveel verskillende soorte skale kan jy dink?

Skryf hul name hier neer.

1. Kyk goed na die volgende voorbeelde van skale. Werk saam met ’n maat en skryf die lesing op elke skaal neer.

1.1

1.2

1.3

1.4

1.5

1.6

2. Kyk na die volgende tekeninge en skryf die massa van die voorwerpe neer.

2.1

2.2

2.3

2.4

Aktiwiteit 3:

Om te skat, te meet en op te teken [LU 4.5.1]

Om met toepaslike meetinstrumente presies te meet [LU 4.7.1]

Werk in groepe van drie. Bring die volgende items van die huis af saam:

’n skaal ; 1 koppie rou rys ; 1 koppie suiker ; 1 koppie koekmeel ; 1 koppie sout ; 1 koppie graanvlokkies en 1 koppie rosyntjies.(Onthou om dieselfde koppie te gebruik wanneer julle afmeet!)

1. Bepaal nou die massa van bogenoemde en voltooi die tabel.

Item Massa in g geskat Gemeet Verskil
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................

2. Wat weeg die swaarste?

3. Wat weeg die ligste?

Aktiwiteit 4:

Om probleme op te los wat die kies van berekening met en herlei van standaardeenhede insluit [LU 4.6]

Questions & Answers

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
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
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 did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Wiskunde graad 5. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10993/1.1
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