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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 14

Mielies

Mielies

Mielies is ‘n belangrike deel van ‘n gebalanseerde dieet vir Suid-Afrikaners. Dit is een van ons land se belangrikste graansoorte en verskaf werk aan duisende boere en plaaswerkers. Dit is ook ‘n belangrike dierevoedsel en dien ook as grondstof vir die vervaardiging van papier, verf, tekstielware, medisyne en voedselprodukte. Dit is ook ‘n belangrike bron van energie.

Opdrag:

Plant ‘n paar mieliesade ongeveer 2 cm diep in grond wat jy met kompos voorberei het. Die sade moet ongeveer 30 cm van mekaar af wees. Onthou om dit elke dag nat te maak.

Luister mooi na die les wat jou onderwyser vir jou gee en voltooi dan die taakkaart oor mielies.

Wees ‘n kok: ontwerp jou eie sjokoladekoekies. Gebruik gesmelte sjokolade, ‘n bietjie klapper, groen en rooi kersies, neute en ontbytpap wat van mielies gemaak is, bv. Corn Flakes. Maak seker dat ‘n volwassene jou help om die sjokolade te smelt.

Memorandum

MIELIES

Mielies groei goed

  • sonnige weer
  • geen ryp
  • goeie reënval

Mielieboere se probleme

  • onkruid
  • haelstorms
  • droogte

Gebruike van mielies

  • mielierys
  • mieliemeel
  • lekkers
  • ontbytkosse
  • veevoer
  • stysel
  • papier

Groei van die mielieplant

  • lente: plant
  • somer: groei
  • herfs: word ryp
  • winter: oes

Questions & Answers

general equation for photosynthesis
Ojasope Reply
6CO2 + 6H2O + solar energy= C6H1206+ 6O2
Anastasiya
meaning of amino Acids
AJAYI Reply
a diagram of an adult mosquito
mubarak Reply
what are white blood cells
Mlungisi Reply
white blood cell is part of the immune system. that help fight the infection.
MG
what about tissue celss
Mlungisi
Cells with a similar function, form a tissue. For example the nervous tissue is composed by cells:neurons and glia cells. Muscle tissue, is composed by different cells.
Anastasiya
I need further explanation coz celewi anything guys,,,
Calvin Reply
hey guys
Isala
on what?
Anastasiya
hie
Lish
is air homogenous or hetrogenous
damiane Reply
homogenous
Kevin
why saying homogenous?
Isala
explain if oxygen is necessary for photosynthesis
Allice Reply
explain if oxygen is necessary for photosynthesis
Allice Reply
Yes, the plant does need oxygen. The plant uses oxygen, water, light, and produced food. The plant use process called photosynthesis.
MG
By using the energy of sunlight, plants convert carbon dioxide and water into carbohydrates and oxygen by photosynthesis. This happens during the day and sunlight is needed.
NOBLE
no. it s a product of the process
Anastasiya
yet still is it needed?
NOBLE
no. The reaction is: 6CO2+6H20+ solar energy =C6H12O6(glucose)+602. The plant requires Carbon dioxyde, light, and water Only, and produces glucose and oxygen( which is a waste).
Anastasiya
what was the question
NOBLE Reply
joining
Godfrey
the specific one
NOBLE
the study of non and living organism is called.
Godfrey
Is call biology
Alohan
yeah
NOBLE
yes
Usher
what Is ecology
Musonda Reply
what is a cell
Emmanuel Reply
A cell is a basic structure and functional unit of life
Ndongya
what is biolgy
Hawwi Reply
is the study of living and non living organisms
Ahmed
may u draw the female organ
MARTIN Reply
i dont understand
Asal
:/
Asal
me too
DAVID
anabolism and catabolism
Sani Reply
Anabolism refers to the process in methabolism in which complex molecules are formed "built" and requires energy to happen. Catabolism is the opposite process: complex molecules are deconstructed releasing energy, such as during glicolysis.
Anastasiya
Explain briefly independent assortment gene .
Otu Reply
hi
Amargo
hi I'm Anatalia
Joy
what do you mean by pituitary gland
Digambar
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

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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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