<< Chapter < Page Chapter >> Page >

Natuurwetenskappe

Graad 8

Omgewing en interaksies

Module 38

Die rol van water in die natuur en as hulpbron

Aktiwiteit 1:

Om die waarde van water en die watersiklus te kan verduidelik

[lu 1.3; 2.3; 2.4]

Ons planeet vertoon blou vanuit die buitenste ruim as gevolg van die water teenwoordig.

Water is onontbeerlik vir lewe op ons planeet. Sonder water sal ekologiese oorlewing nie moontlik wees nie.

Ons planeet is net soos ’n ruimteskip toegerus met ’n sekere kwota water. Dit word nie vanuit die buitenste ruim aangevul nie en moet dus SIRKULEER . So is die WATERSIKLUS ’n uiters belangrike aspek van die natuur. Dit is ook besonder effektief indien die mens dit nie versteur nie.

Die watersiklus

Teken ’n voorstelling van die watersiklus soos wat jy dit verstaan. Gebruik verduidelikende byskrifte. Gebruik die voorstelling hiernaas bladsy as riglyn.

Die volgende tabel verduidelik die hoofstappe in die siklus:

TERM BESKRYWING
Wolkvorming Saampak van waterdruppels in die atmosfeer
Verdamping Water na waterdamp
Presipitasie/ Neerslag Water val na die aarde in die vorm van reën, sneeu, hael, kapok
Kondensasie Waterdamp na waterdruppels
Straling Verhitting deur die son
Transpirasie Plante se blaaroppervlaktes verloor waterdamp deur huidmondjies
Infiltrasie Water sak in die grond in
Afloop Water loop teen grondoppervlaktes na riviere, damme en mere

Assessering van WATERSIKLUSSKETS

Kon jy basiese komponente en definisies GRAFIES voorstel?

[2.3]

El niño, droogtes en vloede

  • Suid-Afrika is ’n waterarm land as jy sy reënvalsyfers met dié van ander lande vergelyk.
  • Slegs van die groter riviere is standhoudend.
  • Verder word ons klimaat en reënvalpatrone deur verskynsels soos El Niño beïnvloed. Dit is ’n wêreldwye weerverskynsel en voorsorgsmaatreëls moet getref word om dit die hoof te kan bied.

1. Vind meer uit oor El Niño en rapporteer terug aan klas. Som jou notas kortliks op.

2. Vind artikels oor droogtes en oorstromings in Suid-Afrika en bring dit klas toe.Ruil julle informasie en artikels met mekaar uit.Maak notas oor die onderwerp.

[LU 1.3]

[LU 2.3]

AKTIWITEIT 2:

Om die waarde van water en die gebruik daarvan in en om die huis te ondersoek

[LU 2.3; 3.2]

Waterverbruik by die huis

Vra jou ouers of voog vir hul munisipale rekeninge:

  • skryf julle huishouding (drie somermaande en drie wintermaande) se waterverbruik vir die ses maande neer.

Somermaande : 1. ......................... 2. ......................... 3. .........................

Wintermaande : 1. ......................... 2. ......................... 3. .........................

  • Dink jy julle waterverbruik is buitensporig?

Waterbesparing by die huis

Hoe kan jou gesin bydra tot waterbesparing? Wat kan JY doen?

  • Maak ’n lys van die beste voorstelle:

Assessering van KLASBESPREKING

Kon jy werkbare voorstelle tot WATERBESPARING maak?

[3.2]

Aktiwiteit 3:

Om die aanpassings van plante en diere t.o.v. watertekort te ondersoek

[lu 1.3; 2.3]

Plante:

  • In ’n vorige module is verwys na plante wat volgens waterbehoeftes in drie groepe geklassifiseer kan word.

Noem die drie groepe met ’n voorbeeld van elk.

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
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 8' conversation and receive update notifications?

Ask