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Natuurwetenskappe

Energie-oordrag en kragte

Opvoeders afdeling

Memorandum

(i) Yskas; ketel; rooster

(ii) Konveksieverwarmer; waaiverwarmer; yster

(iii) Yskas; ketel; stofsuier of rooster

(iv) Menger; konveksieverwarmer; waaierverwarmer; filtreerkan

Bv. Verwarmers kan vervang word deur isolerende plafonne, matte of sementvloere, digsluitende ruite, ens.

Leerder afdeling

Inhoud

Aktiwiteit: om die energieverbruik van verskeie elektriese toestelle te vergelyk [lu 3.2]

a. Bestudeer die volgende en beantwoord dan die daaropvolgende vrae:

Met slegs een eenheid elektrisiteit _________________________________________

Hierdie kaart dui die bedryfskoste van sommige huishoudelike toestelle aan volgens hulle verbruik per eenheid elektrisiteit.

(i) Watter drie toestelle is volgens hierdie kaart die goedkoopste?

_____________________________________________________________________

(ii) Watter drie toestelle is die duurste om aan te hou?

_____________________________________________________________________

(iii) Watter toestelle word die meeste in huishoudings gebruik?

_____________________________________________________________________

(iv) Watter toestelle sou jy sê is onnodig en kan vervang word deur iets wat nie so baie brandstof gebruik nie of kan heeltemal uitgeskakel word? Dui aan waardeur dit vervang kan word.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

(b) Baie mense in Suid-Afrika het egter nog nie toegang tot elektrisiteit nie en gebruik brandhout, paraffien of gas as brandstowwe om kos te kook en huise warm te hou. Die brandstowwe (veral hout) word skaarser en mense moet ver loop om genoeg brandhout bymekaar te kry. Dit is dus uiters noodsaaklik dat ook hierdie brandstowwe doeltreffend gebruik word ten einde besparing teweeg te bring.

Baie van hierdie mense maak gebruik van ‘n oop vuurmaakplek en dan word baie van die hitte-energie na die lug rondom oorgedra. Mense gebruik ook ‘n gasstofie verkeerd en soms word daar baie energie vermors.

GROEPWERK

Elke groep kies ‘n kooktoestel wat deur die meerderheid Suid-Afrikaners in veral plattelandse gebiede gebruik word, bv. oop vuur; gasstofie, ens. Hierdie toestel moet prakties voorgestel word deur middel van ‘n model en daarna moet ‘n kort verslaggie daaroor geskryf word. In die verslag moet die volgende vrae beantwoord word.

  • Watter brandstof word gebruik?
  • Is dit maklik bekombaar vir die mense?
  • Watter kleur pot word aanbeveel? Hoekom?
  • Watter voorsorg moet getref word sodat daar nie te veel hitte-energie verby die pot beweeg en in die lug verlore gaan nie?
  • Wat is die koste van die brandstof?

Leerkragassessering

Kriteria 1 2 3 4
Opdrag: Korrek uitgevoer; volledig; saaklik; betyds ingehandig
Model: Effektief; brandstof aangedui; kreatiewe voorstelling
Verslag: Alle vrae aangespreek; verslagdoening netjies; goeie taalgebruik
Samewerking in groep: Effektief; oplos van onderlinge geskille; alle lede betrokke
OORHEERSENDE KODE

Assessering

Leeruitkomste 3: Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon .

Assesseringstandaard 3.2: Dit is duidelik wanneer die leerder die volhoubare gebruik van die aarde se hulpbronne verstaan: ontleed inligting oor volhoubare en nie-volhoubare gebruik van hulpbronne.

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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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