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Natuurwetenskappe

Energie-oordrag en kragte

A. kragte

Opvoeders afdeling

Memorandum

Leerder afdeling

Inhoud

Aktiwiteit: om verslag te doen oor ‘n menslike prestasie in die wetenskap [lu 3.1]

Omdat Mark Shuttleworth beskou kan word as ‘n baanbreker op dié gebied, was die koerante en tydskrifte vol artikels oor die groot gebeurtenis. Gebruik dit as bronne en skryf ‘n verslag van ± twee foliobladsye oor die reis. Nog meer interessante inligting en foto’s is beskikbaar op die volgende webtuiste: http://www.africaninspace.com .

Riglyne vir die samestelling van die inhoud van jou verslag:

1. Mark Shuttleworth en sy drome en ideale

2. Voorbereiding vir die reis

3. Redes vir die reis

4. Die reis self

5. Wat beteken dit vir die mens, asook vir Suid-Afrika?

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B. Magnetisme

Daar word vertel dat die Grieke meer as 2 000 jaar gelede ‘n snaakse soort klip ontdek het. Magnes, ‘n skaapwagterseuntjie, het eendag terwyl hy skape opgepas het, opgemerk dat die ysterpunt van sy staf so sterk deur ‘n groot swart klip aangetrek word dat hy dit glad nie kon loskry nie. Volgens die fabel is die woord ‘magneet’ afgelei van die seuntjie se naam. Dit is natuurlik nie moontlik om te bewys dat die fabel waar is nie, maar dit is wel ‘n feit dat sekere soorte swart klippe soortgelyke klippe en sekere metale aantrek. Baie van hierdie soort klip is naby Magnesia in Turkye gevind en word magneetsteen genoem. Die woord ‘magneet’ is dus heel moontlik afgelei van hierdie stad se naam. Hierdie klippe is natuurlike magnete. Ons gebruik vandag kunsmatige magnete wat van yster of staal gemaak is. Hierdie magnete word vervaardig om voorwerpe baie sterk aan te trek en hul magnetisme lank te behou. In jul skool se laboratorium sal jy heel moontlik magnete van vier verskillende vorms vind:

Staafmagneet
Hoefmagneet
Silindriese magneet
Ringmagneet

Magnete moet versigtig hanteer word, anders verloor hulle hul magnetisme.

Onthou altyd die volgende wanneer jy met magnete werk:

  • Moenie magnete hardhandig gebruik nie, d.w.s. moenie dit kap of laat val nie.
  • Moenie magnete verhit nie.
  • Bêre altyd magnete met hul sluitstukke in posisie.

1. Magnetiese stowwe en nie-magnetiese stowwe

Nie alle voorwerpe sal deur ‘n magneet aangetrek word nie. Om vas te stel watter stowwe magneties en watter stowwe nie-magneties is, gaan ons die volgende eksperiment doen.

Assessering

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

Assessment Standard 3.1: Dit is duidelik wanneer die leerder wetenskap as ‘n menslike aktiwiteit verstaan: vergelyk verskillende interpretasies van gebeurtenisse.

Questions & Answers

Discuss the differences between taste and flavor, including how other sensory inputs contribute to our  perception of flavor.
John Reply
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
which drugs can we use for ulcers
Ummi Reply
omeprazole
Kamara
what
Renee
what is this
Renee
is a drug
Kamara
of anti-ulcer
Kamara
Omeprazole Cimetidine / Tagament For the complicated once ulcer - kit
Patrick
what is the function of lymphatic system
Nency Reply
Not really sure
Eli
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include: 1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
what is anatomy
Oyindarmola Reply
Anatomy is the identification and description of the structures of living things
Kamara
what's the difference between anatomy and physiology
Oyerinde Reply
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Mohammed Reply
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
yes
Prince
how does the stomach protect itself from the damaging effects of HCl
Wulku Reply
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
Ali Reply
function of digestive
Ali
the diagram of the lungs
Adaeze Reply
what is the normal body temperature
Diya Reply
37 degrees selcius
Xolo
37°c
Stephanie
please why 37 degree selcius normal temperature
Mark
36.5
Simon
37°c
Iyogho
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
37A c
Wulku
what is anaemia
Diya Reply
anaemia is the decrease in RBC count hemoglobin count and PVC count
Eniola
what is the pH of the vagina
Diya Reply
how does Lysin attack pathogens
Diya
acid
Mary
I information on anatomy position and digestive system and there enzyme
Elisha Reply
anatomy of the female external genitalia
Muhammad Reply
Organ Systems Of The Human Body (Continued) Organ Systems Of The Human Body (Continued)
Theophilus Reply
what's lochia albra
Kizito
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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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