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Natuurwetenskappe

Planeet aarde en die heelal

Die aarde

Opvoeder afdeling

Memorandum

Opdrag 1:

  • Assesseer volgens assesseringsmatriks.

Opdrag 2:

Hoofgedagtes:

  • Aardbewing: oggend van 29 September 1969.
  • Registreer 6,5 op Richterskaal.
  • Chaos veroorsaak in meeste plekke.
  • Gedreun het al harder geword en toe geweldige skudding.
  • Hele aarde het gebewe en mense het paniekerig rondgehardloop.
  • Reddingswerkers het poskantoor as basis gebruik omdat dit enigste plek met elektrisiteit was.
  • Huise is erg beskadig en mense is ernstig beseer.
  • Noodhulp het na rampdorpe ingestroom en weermag en polisie het saamgewerk.
  • Mense in tente gehuisves en veldhospitale is opgerig.
  • Waternood is verlig en voedsel verskaf.
  • R13 miljoen geskenk deur rampkomitee.

Opdrag 3:

  • (skets)

Opdrag 4:

1. Die Richterskaal is die instrument (skaal) wat seismoloë gebruik om die sterkte van ‘n aardbewing te bepaal.

2. Seismoloë is wetenskaplikes wat aardbewings bestudeer.

3. Die plek waar die golwe (trillings) die eerste keer aan die aardoppervlak raak, word die episentrum genoem.

4. Indien die drukking in die mantel onder die aardkors opbou, word magma deur swak plekke en krake gedwing. Hierdie swak plekke vorm dan vulkaniese pype.

5. Aktiewe vulkane is vulkane wat van tyd tot tyd uitbars.

Leerder afdeling

Inhoud

Aktiwiteit: om die struktuur van die aarde te ontleed en om bewegings daarbinne te meet (natuurrampe) [lu 2.1, lu 2.3]

STRUKTUUR VAN DIE AARDE

  • Wetenskaplikes meen dat die aarde waarskynlik sowat 4 600 miljoen jaar gelede ontstaan het as ‘n groot wolk gasse en stof wat in die ruimte rondgedraai het. Terwyl dit gedraai het, het dit gekrimp tot ‘n vuurwarm, vloeibare bal. Die oppervlak het geleidelik afgekoel en ‘n kors van soliede rots gevorm wat verweer het tot die berge, grond en sand waarop ons vandag lewe.
  • Die aarde is gedurig besig om te verander. Die landmassas (kontinente) beweeg nie net nie, maar nuwe kors word gedurig gevorm. Die beweging van die aardkors word kontinentale drywing genoem en dit gaan steeds voort. Amerika beweeg byvoorbeeld geleidelik weg van Europa en dit het al telefoonkabels onder die Atlantiese Oseaan laat breek.

VIER AARDLAE

  • Aardkors

Die aardkors is die boonste laag en het ‘n deursnee van 5 km tot 70 km. Waar daar berge is, kan die deursnee tot 70 km wees, maar onder oseane is dit maar sowat 5 km dik. Onder die aardkors is daar nog drie lae, nl.

  • Mantel

Die mantel het ‘n deursnee van 2 900 km. Dit is solied, hoewel daar strome digte halfgesmelte metale voorkom wat baie stadig vloei.

  • Binnekern

Die binnekern in die middel van die aarde is waarskynlik solied en bestaan meestal uit metale. Dit het ‘n deursnee van 2 440 km en die temperatuur is 3 700 grade Celsius. Water kook teen 100 grade Celsius op die aarde!

  • Buitekern

Die buitekern bestaan uit vloeibare metaal en is verantwoordelik vir die aarde se magneetveld. Dit het ’n deursnee van 2 240 km.

Wanneer vulkane uitbars, kom die magma of lawa uit die mantel.

OPDRAG 1: GROEPWERK

Gebruik speeldeeg (vier verskillende kleure) en maak ‘n model van die aarde se struktuur. Die dikte van elke laag moet min of meer in verhouding wees met die werklikheid. Gebruik ‘n rooi balletjie klei om die kern van die aarde aan te dui.

Questions & Answers

are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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