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Natuurwetenskappe

Graad 5

Die aarde en die heelal

Module 21

Hoe grond gevorm word

Aktiwiteit:

Om te kan verduidelik hoe grond gevorm word en hoekom grond vir diere belangrik is

[lu 1.3]

Die aarde bestaan uit hoofsaaklik drie lae: die kors, die mantel en die kern.

Die kors is die dunste laag en is ongeveer 35 tot 50 km dik. Dit bestaan hoofsaaklik uit soliede rots.

Die rotse aan die oppervlak breek voortdurend op om grond te vorm. Dit gebeur deurdat die hitte van die son en die koue van die nag die rotse weens uitsetting en inkrimping laat kraak.

Plantwortels veroorsaak dat die rotse nog verder opbreek. Nuwe plante groei in die skeure. Hulle vrek en verrot, en hierdie verrotte materiaal saam met kleiner rotsdeeltjies vorm grond.

Water (reën, riviere, die see) laat die rotse ook verder opbreek en spoel die deeltjies ook weg na ander plekke waar dan ook grond gevorm word. Baie klein deeltjies word ook deur die wind versprei.

Hoe word grond deur diere benut?

Skryf die dierename neer wat grond op een of ander manier benut, en verduidelik hoe hulle dit benut. Begin met die diere in die illustrasies hierbo en vul aan met nog meer voorbeelde van jou eie.

Wat gebeur met hierdie diere as hulle in of op die grond vrek?

Assessering

LU 1

WETENSKAPLIKE ONDERSOEK Die leerder is in staat om met selfvertroue op weetgierigheid oor natuurlike verskynsels te reageer, en om binne die konteks van wetenskap, tegnologie en die omgewing verbande te ondersoek en probleme op te los.

Dit is duidelik wanneer die leerder:

1.1 ondersoeke beplan;

1.2 ondersoeke uitvoer en data versamel;

1.3 data evalueer en bevindinge kommunikeer.

Memorandum

voorbeelde van diere wat die grond benut:

  • Erdwurm vreet verrottende materiaal in grond, grond beskerm teen hitte en uitdroging, asook predatore
  • Miere stoor kosvoorrade en eiers
  • Jagspinnekop tonnel in grond beskerm teen elemente en predatore
  • Haan/hen kry kos in/op grond, sand help met fynmaal van kos vir vertering
  • Haas Beskerming teen roofdiere, plek om kleintjies groot te maak
  • Mol Vind kos in grond (plantwortels en insekte)
  • Paddas Beskerming teen uitdroging en koue, oorlewing van ongunstige tydperke
  • Slange Beskerming teen natuurelemente en predatore
  • Vlakvarke Beskerming teen predatore

Diere wat vrek: hulle ontbind en die reste word deel van die grond, en so word grondvrugbaarheid bevorder.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, Natuurwetenskappe graad 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10980/1.2
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