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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

the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
what is cell divisoin?
Aron Reply
Diversity of living thing
ISCONT
what is cell division
Aron Reply
Cell division is the process by which a single cell divides into two or more daughter cells. It is a fundamental process in all living organisms and is essential for growth, development, and reproduction. Cell division can occur through either mitosis or meiosis.
AI-Robot
What is life?
Allison Reply
life is defined as any system capable of performing functions such as eating, metabolizing,excreting,breathing,moving,Growing,reproducing,and responding to external stimuli.
Mohamed
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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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