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Natuurwetenskappe

Graad 8

Omgewing en interaksies

Module 33

Verskillende ekosisteme

Ons land is ryk aan wyduiteenlopende soorte ekosisteme.

Jou onderwyser sal julle waar moontlik na een of meer van hierdie ekosisteme neem.

Aktiwiteit 1:

Om die nut van ’n grasveld-ekosisteem te bespreek

[lu 1.3]

In groot dele van ons land vorm gras die grootste deel van die ekosisteme. Ons kan ook die term BIOOM gebruik om na die dele van ’n land wat min of meer dieselfde ekologiese kenmerke toon, te verwys. So kry ons byvoorbeeld ’n grasveldbioom. ’n Grasveldbioom kan as ’n groot ekosisteem beskryf word of dit kan in kleiner grasveld-ekosisteme verdeel word.

Kennis van die grasveldbioom en -ekosisteme is belangrik in Suid-Afrika, aangesien groot dele van die land vir veebeweiding benut word.

Wildsboksoorte soos impala, buffels en springbokke is ook grasvreters.

Die tipe gras in ’n ekosisteem word hoofsaaklik deur die aard van die grond bepaal.

Grasveldbiome word in terme van die dominante grassoort wat daarin voorkom, benoem.

Die hooftipes grasveld-ekosisteme (eintlik biome) is:

1. soetveld – lae reënvalgebiede; goeie voer vir vee;

2. suurveld – hoë reënvalareas; nie baie goeie weiding nie;

3. gemengde veld.

Rooigras Themeda triandra is ’n welbekende grassoort wat baie voedsaam is vir vee.

Oorbeweiding is die boer se grootste oortreding, want dit lei op sy beurt tot erosie, woestynvorming en gevolglik hongersnood.

Voer ’n klasdebat oor die volgende vraag:

  • Is die gereelde brand van gras goed of sleg vir die omgewing?
  • Dui die voor- en nadele soos wat dit uit die debat voortspruit in die kolom hieronder aan.
VOORDELE VAN BRAND NADELE VAN BRAND
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.............................................................. ..............................................................
.............................................................. ..............................................................
.............................................................. ..............................................................
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.............................................................. ..............................................................

Assessering van DEBAT:

Het jy ’n waardevolle bydrae tot debat gelewer?

[LU 1.3]

Aktiwiteit 2:

Om ’n woud/boomekosisteem te bespreek

[lu 1.2; 1.3; 2.4]

Bome is nie net produseerders nie, maar vorm as gevolg van hul grootte ook die habitat van verskeie spesies.

Dier- en plantspesies bewoon bome.

Die blaarbedekking van bome verskaf skuiling vir voëls. Die bas en skeure in die boom verskaf ’n habitat vir ’n menigte insekspesies. Die blaarbedekking vorm ook ’n skaduryke omgewing vir skaduliewende, laaggroeiende plante.

Die blomme en vrugte wat bome in sommige gevalle voortbring, is ’n kosbron vir baie.

Questions & Answers

what does preconceived mean
sammie Reply
physiological Psychology
Nwosu Reply
How can I develope my cognitive domain
Amanyire Reply
why is communication effective
Dakolo Reply
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
it starts up serve and return practice/assessments.it helps find voice talking therapy also assessments through relaxed conversation.
miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
Wekolamo Reply
please i need answer
Wekolamo
because it helps many people around the world to understand how to interact with other people and understand them well, for example at work (job).
Manix Reply
Agreed 👍 There are many parts of our brains and behaviors, we really need to get to know. Blessings for everyone and happy Sunday!
ARC
A child is a member of community not society elucidate ?
JESSY Reply
Isn't practices worldwide, be it psychology, be it science. isn't much just a false belief of control over something the mind cannot truly comprehend?
Simon Reply
compare and contrast skinner's perspective on personality development on freud
namakula Reply
Skinner skipped the whole unconscious phenomenon and rather emphasized on classical conditioning
war
explain how nature and nurture affect the development and later the productivity of an individual.
Amesalu Reply
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
Zyryn Reply
good👍
Jonathan
and having a good philosophy of the world is like a sandwich and a peanut butter 👍
Jonathan
generally amnesi how long yrs memory loss
Kelu Reply
interpersonal relationships
Abdulfatai Reply
What would be the best educational aid(s) for gifted kids/savants?
Heidi Reply
treat them normal, if they want help then give them. that will make everyone happy
Saurabh
What are the treatment for autism?
Magret Reply
hello. autism is a umbrella term. autistic kids have different disorder overlapping. for example. a kid may show symptoms of ADHD and also learning disabilities. before treatment please make sure the kid doesn't have physical disabilities like hearing..vision..speech problem. sometimes these
Jharna
continue.. sometimes due to these physical problems..the diagnosis may be misdiagnosed. treatment for autism. well it depends on the severity. since autistic kids have problems in communicating and adopting to the environment.. it's best to expose the child in situations where the child
Jharna
child interact with other kids under doc supervision. play therapy. speech therapy. Engaging in different activities that activate most parts of the brain.. like drawing..painting. matching color board game. string and beads game. the more you interact with the child the more effective
Jharna
results you'll get.. please consult a therapist to know what suits best on your child. and last as a parent. I know sometimes it's overwhelming to guide a special kid. but trust the process and be strong and patient as a parent.
Jharna
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Source:  OpenStax, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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