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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 2

Die sigsintuig

Aktiwiteit:

Om te leer oor die sigsintuig

[lu 2.1]

Slim mense sê die oë is die siel van die mens, want as ‘n mens in iemand se oë kyk, kan jy dikwels agterkom watter tipe mens dit is. Sig is een van ons belangrikste sintuie, want dit gee jou ‘n prentjie van dit wat om jou aangaan.

Jou oë het lig nodig om te kan sien. Lig weerkaats van alles wat jy sien en gaan deur die klein swart gaatjie in die middel van jou oog, wat ons die pupil noem. Lig kan van die son af kom, of selfs van ‘n elektriese gloeilamp. As dit effens donker is, word jou pupille groter om meer lig deur te laat, maar wanneer die lig skerp is, word jou pupille kleiner om jou oë te beskerm. Die boodskap van wat jy sien, gaan deur ‘n senuwee na jou brein.

Opdrag:

Voltooi die tekening van die oog deur die byskrifte op die lyntjies, netjies in drukskrif, te skryf.

Hou ‘n groepbespreking oor die volgende:

Hoekom dra sommige mense ‘n bril?

Hoe moet ons optree teenoor kinders in ons klas wat bril dra?

Hou een oog toe, bespreek nou die nut daarvan om twee oë te hê.

Probeer ‘n bal vang met een oog toe.

Baie mense is blind. Hou jou oë styf toe vir ‘n paar minute en kyk hoe jy voel. Hoe moet ons teenoor blinde mense optree?

Assessering

 

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.

 

Memorandum

Opdrag

Oogbyskrifte:

  1. ooglid
  2. oogbol
  3. pupi
  4. ooghare

Questions & Answers

Ayele, K., 2003. Introductory Economics, 3rd ed., Addis Ababa.
Widad Reply
can you send the book attached ?
Ariel
?
Ariel
What is economics
Widad Reply
the study of how humans make choices under conditions of scarcity
AI-Robot
U(x,y) = (x×y)1/2 find mu of x for y
Desalegn Reply
U(x,y) = (x×y)1/2 find mu of x for y
Desalegn
what is ecnomics
Jan Reply
this is the study of how the society manages it's scarce resources
Belonwu
what is macroeconomic
John Reply
macroeconomic is the branch of economics which studies actions, scale, activities and behaviour of the aggregate economy as a whole.
husaini
etc
husaini
difference between firm and industry
husaini Reply
what's the difference between a firm and an industry
Abdul
firm is the unit which transform inputs to output where as industry contain combination of firms with similar production 😅😅
Abdulraufu
Suppose the demand function that a firm faces shifted from Qd  120 3P to Qd  90  3P and the supply function has shifted from QS  20  2P to QS 10  2P . a) Find the effect of this change on price and quantity. b) Which of the changes in demand and supply is higher?
Toofiq Reply
explain standard reason why economic is a science
innocent Reply
factors influencing supply
Petrus Reply
what is economic.
Milan Reply
scares means__________________ends resources. unlimited
Jan
economics is a science that studies human behaviour as a relationship b/w ends and scares means which have alternative uses
Jan
calculate the profit maximizing for demand and supply
Zarshad Reply
Why qualify 28 supplies
Milan
what are explicit costs
Nomsa Reply
out-of-pocket costs for a firm, for example, payments for wages and salaries, rent, or materials
AI-Robot
concepts of supply in microeconomics
David Reply
economic overview notes
Amahle Reply
identify a demand and a supply curve
Salome Reply
i don't know
Parul
there's a difference
Aryan
Demand curve shows that how supply and others conditions affect on demand of a particular thing and what percent demand increase whith increase of supply of goods
Israr
Hi Sir please how do u calculate Cross elastic demand and income elastic demand?
Abari
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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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